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GSFC (N 38°59', W 76°50', Alt 87 m )AERONET Algorithm: Version 2
Site Index
Year: 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016
Channel (nm): 1020, 870, 670, 500, 440, 380, 340, 500 (not interpolated), 1640
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and months (Month) in the observation periods. (alpha and PW are only displayed for 500nm)
|
Overall Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Month |
|
JAN | 0.137 | 0.080 |
••• | ••• |
••• | ••• | 363 |
22 |
FEB | 0.168 | 0.092 |
••• | ••• |
••• | ••• | 371 |
23 |
MAR | 0.225 | 0.145 |
••• | ••• |
••• | ••• | 427 |
23 |
APR | 0.283 | 0.162 |
••• | ••• |
••• | ••• | 447 |
23 |
MAY | 0.387 | 0.242 |
••• | ••• |
••• | ••• | 458 |
24 |
JUN | 0.525 | 0.334 |
••• | ••• |
••• | ••• | 506 |
24 |
JUL | 0.602 | 0.358 |
••• | ••• |
••• | ••• | 534 |
24 |
AUG | 0.591 | 0.363 |
••• | ••• |
••• | ••• | 519 |
24 |
SEP | 0.361 | 0.287 |
••• | ••• |
••• | ••• | 466 |
24 |
OCT | 0.219 | 0.160 |
••• | ••• |
••• | ••• | 463 |
24 |
NOV | 0.162 | 0.111 |
••• | ••• |
••• | ••• | 427 |
24 |
DEC | 0.143 | 0.082 |
••• | ••• |
••• | ••• | 395 |
24 |
YEAR | 0.317 | 0.174 |
••• | ••• |
••• | ••• | 5376 |
283 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1993 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
1993 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | ••• | ••• |
••• | ••• |
••• | ••• | ••• |
••• |
FEB | ••• | ••• |
••• | ••• |
••• | ••• | ••• |
••• |
MAR | ••• | ••• |
••• | ••• |
••• | ••• | ••• |
••• |
APR | ••• | ••• |
••• | ••• |
••• | ••• | ••• |
••• |
MAY | 0.356 | 0.075 |
••• | ••• |
••• | ••• | 2 |
59 |
JUN | 0.670 | 0.491 |
••• | ••• |
••• | ••• | 12 |
224 |
JUL | 0.871 | 0.366 |
••• | ••• |
••• | ••• | 8 |
111 |
AUG | 0.462 | 0.149 |
••• | ••• |
••• | ••• | 3 |
47 |
SEP | 0.256 | 0.088 |
••• | ••• |
••• | ••• | 4 |
98 |
OCT | 0.284 | 0.254 |
••• | ••• |
••• | ••• | 19 |
477 |
NOV | 0.230 | 0.086 |
••• | ••• |
••• | ••• | 13 |
220 |
DEC | 0.204 | 0.097 |
••• | ••• |
••• | ••• | 12 |
178 |
YEAR | ••• | ••• |
••• | ••• |
••• | ••• | 73 |
1414 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1994 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
1994 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | ••• | ••• |
••• | ••• |
••• | ••• | ••• |
••• |
FEB | 0.199 | 0.077 |
••• | ••• |
••• | ••• | 13 |
255 |
MAR | 0.341 | 0.154 |
••• | ••• |
••• | ••• | 12 |
176 |
APR | 0.280 | 0.084 |
••• | ••• |
••• | ••• | 19 |
324 |
MAY | 0.301 | 0.063 |
••• | ••• |
••• | ••• | 5 |
56 |
JUN | 0.740 | 0.370 |
••• | ••• |
••• | ••• | 15 |
196 |
JUL | 0.844 | 0.317 |
••• | ••• |
••• | ••• | 13 |
170 |
AUG | 0.869 | 0.488 |
••• | ••• |
••• | ••• | 11 |
140 |
SEP | 0.552 | 0.442 |
••• | ••• |
••• | ••• | 18 |
400 |
OCT | 0.223 | 0.128 |
••• | ••• |
••• | ••• | 16 |
401 |
NOV | 0.131 | 0.112 |
••• | ••• |
••• | ••• | 20 |
365 |
DEC | 0.162 | 0.133 |
••• | ••• |
••• | ••• | 15 |
316 |
YEAR | ••• | ••• |
••• | ••• |
••• | ••• | 157 |
2799 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1995 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
1995 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.194 | 0.094 |
••• | ••• |
••• | ••• | 11 |
194 |
FEB | 0.188 | 0.122 |
••• | ••• |
••• | ••• | 15 |
244 |
MAR | 0.320 | 0.288 |
••• | ••• |
••• | ••• | 9 |
172 |
APR | 0.361 | 0.193 |
••• | ••• |
••• | ••• | 18 |
411 |
MAY | 0.335 | 0.171 |
••• | ••• |
••• | ••• | 19 |
431 |
JUN | 0.686 | 0.332 |
••• | ••• |
••• | ••• | 15 |
334 |
JUL | 0.809 | 0.378 |
••• | ••• |
••• | ••• | 24 |
379 |
AUG | 0.589 | 0.395 |
••• | ••• |
••• | ••• | 25 |
565 |
SEP | 0.534 | 0.336 |
••• | ••• |
••• | ••• | 22 |
480 |
OCT | 0.350 | 0.067 |
••• | ••• |
••• | ••• | 2 |
41 |
NOV | 0.167 | 0.066 |
••• | ••• |
••• | ••• | 9 |
196 |
DEC | 0.131 | 0.037 |
••• | ••• |
••• | ••• | 16 |
344 |
YEAR | 0.389 | 0.219 |
••• | ••• |
••• | ••• | 185 |
3791 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1996 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
1996 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.206 | 0.106 |
••• | ••• |
••• | ••• | 11 |
157 |
FEB | 0.142 | 0.072 |
••• | ••• |
••• | ••• | 9 |
191 |
MAR | 0.200 | 0.137 |
••• | ••• |
••• | ••• | 16 |
450 |
APR | 0.335 | 0.157 |
••• | ••• |
••• | ••• | 21 |
474 |
MAY | 0.401 | 0.165 |
••• | ••• |
••• | ••• | 16 |
411 |
JUN | 0.777 | 0.495 |
••• | ••• |
••• | ••• | 20 |
497 |
JUL | 0.785 | 0.567 |
••• | ••• |
••• | ••• | 21 |
318 |
AUG | 0.893 | 0.434 |
••• | ••• |
••• | ••• | 25 |
452 |
SEP | 0.462 | 0.374 |
••• | ••• |
••• | ••• | 9 |
170 |
OCT | 0.281 | 0.211 |
••• | ••• |
••• | ••• | 19 |
426 |
NOV | 0.157 | 0.046 |
••• | ••• |
••• | ••• | 14 |
215 |
DEC | 0.155 | 0.057 |
••• | ••• |
••• | ••• | 9 |
169 |
YEAR | 0.400 | 0.273 |
••• | ••• |
••• | ••• | 190 |
3930 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1997 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
1997 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.141 | 0.057 |
••• | ••• |
••• | ••• | 7 |
92 |
FEB | 0.249 | 0.131 |
••• | ••• |
••• | ••• | 13 |
216 |
MAR | 0.191 | 0.083 |
••• | ••• |
••• | ••• | 18 |
393 |
APR | 0.253 | 0.113 |
••• | ••• |
••• | ••• | 9 |
238 |
MAY | 0.306 | 0.155 |
••• | ••• |
••• | ••• | 17 |
430 |
JUN | 0.455 | 0.271 |
••• | ••• |
••• | ••• | 19 |
465 |
JUL | 0.583 | 0.409 |
••• | ••• |
••• | ••• | 23 |
548 |
AUG | 0.613 | 0.355 |
••• | ••• |
••• | ••• | 25 |
338 |
SEP | 0.421 | 0.362 |
••• | ••• |
••• | ••• | 24 |
657 |
OCT | 0.355 | 0.300 |
••• | ••• |
••• | ••• | 16 |
502 |
NOV | 0.180 | 0.083 |
••• | ••• |
••• | ••• | 13 |
496 |
DEC | 0.127 | 0.039 |
••• | ••• |
••• | ••• | 16 |
279 |
YEAR | 0.323 | 0.165 |
••• | ••• |
••• | ••• | 200 |
4654 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1998 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
1998 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.177 | 0.084 |
••• | ••• |
••• | ••• | 18 |
271 |
FEB | 0.180 | 0.057 |
••• | ••• |
••• | ••• | 12 |
218 |
MAR | 0.271 | 0.137 |
••• | ••• |
••• | ••• | 18 |
796 |
APR | 0.282 | 0.156 |
••• | ••• |
••• | ••• | 19 |
449 |
MAY | 0.469 | 0.221 |
••• | ••• |
••• | ••• | 17 |
446 |
JUN | 0.461 | 0.285 |
••• | ••• |
••• | ••• | 18 |
236 |
JUL | 0.755 | 0.425 |
••• | ••• |
••• | ••• | 23 |
405 |
AUG | 0.561 | 0.302 |
••• | ••• |
••• | ••• | 23 |
488 |
SEP | 0.553 | 0.328 |
••• | ••• |
••• | ••• | 23 |
600 |
OCT | 0.181 | 0.116 |
••• | ••• |
••• | ••• | 17 |
457 |
NOV | 0.166 | 0.108 |
••• | ••• |
••• | ••• | 14 |
276 |
DEC | 0.186 | 0.149 |
••• | ••• |
••• | ••• | 17 |
319 |
YEAR | 0.354 | 0.199 |
••• | ••• |
••• | ••• | 219 |
4961 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 1999 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
1999 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.135 | 0.067 |
••• | ••• |
••• | ••• | 16 |
303 |
FEB | 0.212 | 0.116 |
••• | ••• |
••• | ••• | 14 |
280 |
MAR | 0.221 | 0.115 |
••• | ••• |
••• | ••• | 23 |
680 |
APR | 0.269 | 0.194 |
••• | ••• |
••• | ••• | 21 |
552 |
MAY | 0.342 | 0.177 |
••• | ••• |
••• | ••• | 25 |
614 |
JUN | 0.461 | 0.237 |
••• | ••• |
••• | ••• | 20 |
307 |
JUL | 0.653 | 0.374 |
••• | ••• |
••• | ••• | 24 |
438 |
AUG | 0.623 | 0.321 |
••• | ••• |
••• | ••• | 20 |
342 |
SEP | 0.330 | 0.303 |
••• | ••• |
••• | ••• | 17 |
447 |
OCT | 0.216 | 0.109 |
••• | ••• |
••• | ••• | 25 |
621 |
NOV | 0.238 | 0.202 |
••• | ••• |
••• | ••• | 24 |
486 |
DEC | 0.145 | 0.073 |
••• | ••• |
••• | ••• | 23 |
645 |
YEAR | 0.320 | 0.173 |
••• | ••• |
••• | ••• | 252 |
5715 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2000 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2000 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.144 | 0.095 |
••• | ••• |
••• | ••• | 17 |
293 |
FEB | 0.207 | 0.114 |
••• | ••• |
••• | ••• | 17 |
493 |
MAR | 0.238 | 0.136 |
••• | ••• |
••• | ••• | 23 |
762 |
APR | 0.282 | 0.143 |
••• | ••• |
••• | ••• | 16 |
359 |
MAY | 0.588 | 0.316 |
••• | ••• |
••• | ••• | 20 |
526 |
JUN | 0.668 | 0.344 |
••• | ••• |
••• | ••• | 21 |
444 |
JUL | 0.602 | 0.316 |
••• | ••• |
••• | ••• | 21 |
449 |
AUG | 0.627 | 0.285 |
••• | ••• |
••• | ••• | 21 |
356 |
SEP | 0.310 | 0.218 |
••• | ••• |
••• | ••• | 20 |
566 |
OCT | 0.281 | 0.212 |
••• | ••• |
••• | ••• | 23 |
743 |
NOV | 0.159 | 0.089 |
••• | ••• |
••• | ••• | 21 |
437 |
DEC | 0.152 | 0.066 |
••• | ••• |
••• | ••• | 21 |
493 |
YEAR | 0.355 | 0.204 |
••• | ••• |
••• | ••• | 241 |
5921 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2001 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2001 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.159 | 0.097 |
••• | ••• |
••• | ••• | 16 |
359 |
FEB | 0.207 | 0.096 |
••• | ••• |
••• | ••• | 21 |
431 |
MAR | 0.200 | 0.070 |
••• | ••• |
••• | ••• | 19 |
559 |
APR | 0.375 | 0.180 |
••• | ••• |
••• | ••• | 21 |
565 |
MAY | 0.532 | 0.417 |
••• | ••• |
••• | ••• | 22 |
561 |
JUN | 0.722 | 0.432 |
••• | ••• |
••• | ••• | 24 |
659 |
JUL | 0.401 | 0.236 |
••• | ••• |
••• | ••• | 22 |
556 |
AUG | 0.904 | 0.363 |
••• | ••• |
••• | ••• | 24 |
439 |
SEP | 0.328 | 0.217 |
••• | ••• |
••• | ••• | 23 |
569 |
OCT | 0.239 | 0.160 |
••• | ••• |
••• | ••• | 26 |
1006 |
NOV | 0.243 | 0.154 |
••• | ••• |
••• | ••• | 25 |
810 |
DEC | 0.138 | 0.061 |
••• | ••• |
••• | ••• | 22 |
494 |
YEAR | 0.371 | 0.239 |
••• | ••• |
••• | ••• | 265 |
7008 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2002 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2002 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.125 | 0.077 |
••• | ••• |
••• | ••• | 17 |
445 |
FEB | 0.161 | 0.106 |
••• | ••• |
••• | ••• | 21 |
638 |
MAR | 0.260 | 0.139 |
••• | ••• |
••• | ••• | 17 |
490 |
APR | 0.325 | 0.159 |
••• | ••• |
••• | ••• | 24 |
663 |
MAY | 0.429 | 0.336 |
••• | ••• |
••• | ••• | 26 |
700 |
JUN | 0.734 | 0.402 |
••• | ••• |
••• | ••• | 26 |
700 |
JUL | 0.903 | 0.535 |
••• | ••• |
••• | ••• | 23 |
637 |
AUG | 0.694 | 0.388 |
••• | ••• |
••• | ••• | 23 |
638 |
SEP | 0.368 | 0.268 |
••• | ••• |
••• | ••• | 24 |
782 |
OCT | 0.341 | 0.175 |
••• | ••• |
••• | ••• | 14 |
287 |
NOV | 0.158 | 0.071 |
••• | ••• |
••• | ••• | 13 |
314 |
DEC | 0.134 | 0.066 |
••• | ••• |
••• | ••• | 18 |
371 |
YEAR | 0.386 | 0.260 |
••• | ••• |
••• | ••• | 246 |
6665 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2003 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2003 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.129 | 0.065 |
••• | ••• |
••• | ••• | 19 |
448 |
FEB | 0.171 | 0.082 |
••• | ••• |
••• | ••• | 10 |
285 |
MAR | 0.265 | 0.143 |
••• | ••• |
••• | ••• | 19 |
578 |
APR | 0.381 | 0.265 |
••• | ••• |
••• | ••• | 21 |
643 |
MAY | 0.511 | 0.236 |
••• | ••• |
••• | ••• | 12 |
194 |
JUN | 0.650 | 0.264 |
••• | ••• |
••• | ••• | 16 |
443 |
JUL | 0.607 | 0.268 |
••• | ••• |
••• | ••• | 21 |
414 |
AUG | 0.821 | 0.333 |
••• | ••• |
••• | ••• | 19 |
407 |
SEP | 0.373 | 0.306 |
••• | ••• |
••• | ••• | 20 |
496 |
OCT | 0.235 | 0.154 |
••• | ••• |
••• | ••• | 21 |
524 |
NOV | 0.177 | 0.102 |
••• | ••• |
••• | ••• | 20 |
467 |
DEC | 0.102 | 0.047 |
••• | ••• |
••• | ••• | 19 |
402 |
YEAR | 0.368 | 0.232 |
••• | ••• |
••• | ••• | 217 |
5301 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2004 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2004 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.124 | 0.072 |
••• | ••• |
••• | ••• | 19 |
397 |
FEB | 0.147 | 0.089 |
••• | ••• |
••• | ••• | 20 |
575 |
MAR | 0.247 | 0.116 |
••• | ••• |
••• | ••• | 19 |
485 |
APR | 0.333 | 0.185 |
••• | ••• |
••• | ••• | 19 |
481 |
MAY | 0.527 | 0.208 |
••• | ••• |
••• | ••• | 22 |
491 |
JUN | 0.532 | 0.322 |
••• | ••• |
••• | ••• | 19 |
433 |
JUL | 0.869 | 0.429 |
••• | ••• |
••• | ••• | 20 |
432 |
AUG | 0.671 | 0.313 |
••• | ••• |
••• | ••• | 21 |
447 |
SEP | 0.330 | 0.206 |
••• | ••• |
••• | ••• | 14 |
404 |
OCT | 0.180 | 0.110 |
••• | ••• |
••• | ••• | 19 |
567 |
NOV | 0.118 | 0.106 |
••• | ••• |
••• | ••• | 20 |
487 |
DEC | 0.157 | 0.114 |
••• | ••• |
••• | ••• | 20 |
499 |
YEAR | 0.353 | 0.245 |
••• | ••• |
••• | ••• | 232 |
5698 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2005 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2005 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.136 | 0.098 |
••• | ••• |
••• | ••• | 14 |
315 |
FEB | 0.169 | 0.088 |
••• | ••• |
••• | ••• | 20 |
452 |
MAR | 0.276 | 0.213 |
••• | ••• |
••• | ••• | 20 |
424 |
APR | 0.280 | 0.210 |
••• | ••• |
••• | ••• | 20 |
697 |
MAY | 0.421 | 0.248 |
••• | ••• |
••• | ••• | 20 |
531 |
JUN | 0.546 | 0.221 |
••• | ••• |
••• | ••• | 22 |
557 |
JUL | 0.652 | 0.238 |
••• | ••• |
••• | ••• | 22 |
466 |
AUG | 0.819 | 0.462 |
••• | ••• |
••• | ••• | 24 |
702 |
SEP | 0.395 | 0.335 |
••• | ••• |
••• | ••• | 25 |
874 |
OCT | 0.183 | 0.099 |
••• | ••• |
••• | ••• | 16 |
523 |
NOV | 0.150 | 0.077 |
••• | ••• |
••• | ••• | 20 |
487 |
DEC | 0.170 | 0.082 |
••• | ••• |
••• | ••• | 19 |
384 |
YEAR | 0.350 | 0.223 |
••• | ••• |
••• | ••• | 242 |
6412 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2006 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2006 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.136 | 0.089 |
••• | ••• |
••• | ••• | 18 |
377 |
FEB | 0.164 | 0.061 |
••• | ••• |
••• | ••• | 17 |
526 |
MAR | 0.229 | 0.164 |
••• | ••• |
••• | ••• | 23 |
738 |
APR | 0.259 | 0.133 |
••• | ••• |
••• | ••• | 23 |
784 |
MAY | 0.376 | 0.241 |
••• | ••• |
••• | ••• | 26 |
772 |
JUN | 0.522 | 0.257 |
••• | ••• |
••• | ••• | 22 |
601 |
JUL | 0.788 | 0.315 |
••• | ••• |
••• | ••• | 24 |
545 |
AUG | 0.562 | 0.348 |
••• | ••• |
••• | ••• | 25 |
606 |
SEP | 0.481 | 0.370 |
••• | ••• |
••• | ••• | 17 |
472 |
OCT | 0.200 | 0.132 |
••• | ••• |
••• | ••• | 24 |
746 |
NOV | 0.156 | 0.048 |
••• | ••• |
••• | ••• | 14 |
403 |
DEC | 0.178 | 0.095 |
••• | ••• |
••• | ••• | 22 |
444 |
YEAR | 0.338 | 0.208 |
••• | ••• |
••• | ••• | 255 |
7014 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2007 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2007 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.116 | 0.034 |
••• | ••• |
••• | ••• | 18 |
446 |
FEB | 0.144 | 0.072 |
••• | ••• |
••• | ••• | 19 |
652 |
MAR | 0.279 | 0.227 |
••• | ••• |
••• | ••• | 24 |
722 |
APR | 0.297 | 0.160 |
••• | ••• |
••• | ••• | 17 |
438 |
MAY | 0.486 | 0.330 |
••• | ••• |
••• | ••• | 27 |
915 |
JUN | 0.678 | 0.428 |
••• | ••• |
••• | ••• | 27 |
684 |
JUL | 0.621 | 0.317 |
••• | ••• |
••• | ••• | 27 |
663 |
AUG | 0.845 | 0.377 |
••• | ••• |
••• | ••• | 24 |
635 |
SEP | 0.393 | 0.297 |
••• | ••• |
••• | ••• | 27 |
1061 |
OCT | 0.276 | 0.238 |
••• | ••• |
••• | ••• | 23 |
716 |
NOV | 0.217 | 0.137 |
••• | ••• |
••• | ••• | 21 |
383 |
DEC | 0.154 | 0.087 |
••• | ••• |
••• | ••• | 14 |
293 |
YEAR | 0.375 | 0.235 |
••• | ••• |
••• | ••• | 268 |
7608 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2008 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2008 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.154 | 0.084 |
••• | ••• |
••• | ••• | 22 |
474 |
FEB | 0.177 | 0.102 |
••• | ••• |
••• | ••• | 17 |
420 |
MAR | 0.253 | 0.143 |
••• | ••• |
••• | ••• | 23 |
636 |
APR | 0.348 | 0.173 |
••• | ••• |
••• | ••• | 16 |
382 |
MAY | 0.328 | 0.186 |
••• | ••• |
••• | ••• | 22 |
635 |
JUN | 0.527 | 0.262 |
••• | ••• |
••• | ••• | 28 |
708 |
JUL | 0.612 | 0.288 |
••• | ••• |
••• | ••• | 24 |
642 |
AUG | 0.457 | 0.245 |
••• | ••• |
••• | ••• | 26 |
722 |
SEP | 0.320 | 0.162 |
••• | ••• |
••• | ••• | 20 |
556 |
OCT | 0.165 | 0.073 |
••• | ••• |
••• | ••• | 24 |
756 |
NOV | 0.222 | 0.156 |
••• | ••• |
••• | ••• | 16 |
377 |
DEC | 0.135 | 0.056 |
••• | ••• |
••• | ••• | 16 |
265 |
YEAR | 0.308 | 0.156 |
••• | ••• |
••• | ••• | 254 |
6573 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2009 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2009 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.150 | 0.097 |
••• | ••• |
••• | ••• | 18 |
497 |
FEB | 0.189 | 0.085 |
••• | ••• |
••• | ••• | 22 |
572 |
MAR | 0.241 | 0.171 |
••• | ••• |
••• | ••• | 18 |
522 |
APR | 0.229 | 0.102 |
••• | ••• |
••• | ••• | 18 |
618 |
MAY | 0.291 | 0.165 |
••• | ••• |
••• | ••• | 16 |
491 |
JUN | 0.375 | 0.167 |
••• | ••• |
••• | ••• | 23 |
434 |
JUL | 0.443 | 0.175 |
••• | ••• |
••• | ••• | 25 |
517 |
AUG | 0.485 | 0.183 |
••• | ••• |
••• | ••• | 24 |
496 |
SEP | 0.249 | 0.116 |
••• | ••• |
••• | ••• | 18 |
521 |
OCT | 0.176 | 0.076 |
••• | ••• |
••• | ••• | 15 |
480 |
NOV | 0.196 | 0.092 |
••• | ••• |
••• | ••• | 15 |
460 |
DEC | 0.110 | 0.053 |
••• | ••• |
••• | ••• | 17 |
433 |
YEAR | 0.261 | 0.117 |
••• | ••• |
••• | ••• | 229 |
6041 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2010 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2010 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.138 | 0.084 |
••• | ••• |
••• | ••• | 20 |
377 |
FEB | 0.166 | 0.091 |
••• | ••• |
••• | ••• | 15 |
419 |
MAR | 0.156 | 0.124 |
••• | ••• |
••• | ••• | 16 |
678 |
APR | 0.265 | 0.124 |
••• | ••• |
••• | ••• | 24 |
846 |
MAY | 0.268 | 0.157 |
••• | ••• |
••• | ••• | 20 |
626 |
JUN | 0.394 | 0.173 |
••• | ••• |
••• | ••• | 27 |
655 |
JUL | 0.466 | 0.255 |
••• | ••• |
••• | ••• | 26 |
792 |
AUG | 0.517 | 0.204 |
••• | ••• |
••• | ••• | 23 |
616 |
SEP | 0.256 | 0.183 |
••• | ••• |
••• | ••• | 23 |
893 |
OCT | 0.206 | 0.133 |
••• | ••• |
••• | ••• | 22 |
786 |
NOV | 0.123 | 0.072 |
••• | ••• |
••• | ••• | 22 |
668 |
DEC | 0.116 | 0.054 |
••• | ••• |
••• | ••• | 14 |
338 |
YEAR | 0.256 | 0.136 |
••• | ••• |
••• | ••• | 252 |
7694 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2011 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2011 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.164 | 0.089 |
••• | ••• |
••• | ••• | 14 |
264 |
FEB | 0.172 | 0.117 |
••• | ••• |
••• | ••• | 19 |
471 |
MAR | 0.183 | 0.077 |
••• | ••• |
••• | ••• | 20 |
573 |
APR | 0.320 | 0.196 |
••• | ••• |
••• | ••• | 17 |
420 |
MAY | 0.373 | 0.180 |
••• | ••• |
••• | ••• | 21 |
432 |
JUN | 0.484 | 0.285 |
••• | ••• |
••• | ••• | 26 |
592 |
JUL | 0.523 | 0.242 |
••• | ••• |
••• | ••• | 28 |
849 |
AUG | 0.392 | 0.211 |
••• | ••• |
••• | ••• | 19 |
543 |
SEP | 0.621 | 0.331 |
••• | ••• |
••• | ••• | 9 |
249 |
OCT | 0.189 | 0.077 |
••• | ••• |
••• | ••• | 20 |
563 |
NOV | 0.126 | 0.055 |
••• | ••• |
••• | ••• | 18 |
534 |
DEC | 0.116 | 0.028 |
••• | ••• |
••• | ••• | 17 |
381 |
YEAR | 0.305 | 0.172 |
••• | ••• |
••• | ••• | 228 |
5871 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2012 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2012 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.125 | 0.050 |
••• | ••• |
••• | ••• | 22 |
445 |
FEB | 0.138 | 0.039 |
••• | ••• |
••• | ••• | 20 |
724 |
MAR | 0.233 | 0.117 |
••• | ••• |
••• | ••• | 23 |
769 |
APR | 0.214 | 0.101 |
••• | ••• |
••• | ••• | 24 |
732 |
MAY | 0.386 | 0.195 |
••• | ••• |
••• | ••• | 18 |
572 |
JUN | 0.422 | 0.302 |
••• | ••• |
••• | ••• | 25 |
712 |
JUL | 0.487 | 0.152 |
••• | ••• |
••• | ••• | 24 |
561 |
AUG | 0.538 | 0.211 |
••• | ••• |
••• | ••• | 21 |
467 |
SEP | 0.275 | 0.174 |
••• | ••• |
••• | ••• | 23 |
699 |
OCT | 0.197 | 0.109 |
••• | ••• |
••• | ••• | 17 |
449 |
NOV | 0.144 | 0.038 |
••• | ••• |
••• | ••• | 18 |
493 |
DEC | 0.165 | 0.104 |
••• | ••• |
••• | ••• | 15 |
208 |
YEAR | 0.277 | 0.145 |
••• | ••• |
••• | ••• | 250 |
6831 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2013 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2013 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.139 | 0.075 |
••• | ••• |
••• | ••• | 18 |
408 |
FEB | 0.151 | 0.051 |
••• | ••• |
••• | ••• | 14 |
406 |
MAR | 0.145 | 0.070 |
••• | ••• |
••• | ••• | 17 |
499 |
APR | 0.254 | 0.073 |
••• | ••• |
••• | ••• | 22 |
756 |
MAY | 0.253 | 0.148 |
••• | ••• |
••• | ••• | 20 |
549 |
JUN | 0.313 | 0.147 |
••• | ••• |
••• | ••• | 19 |
584 |
JUL | 0.360 | 0.184 |
••• | ••• |
••• | ••• | 21 |
518 |
AUG | 0.360 | 0.227 |
••• | ••• |
••• | ••• | 19 |
439 |
SEP | 0.229 | 0.227 |
••• | ••• |
••• | ••• | 27 |
837 |
OCT | 0.208 | 0.110 |
••• | ••• |
••• | ••• | 19 |
599 |
NOV | 0.092 | 0.046 |
••• | ••• |
••• | ••• | 20 |
467 |
DEC | 0.139 | 0.079 |
••• | ••• |
••• | ••• | 16 |
293 |
YEAR | 0.220 | 0.091 |
••• | ••• |
••• | ••• | 232 |
6355 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2014 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2014 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.103 | 0.051 |
••• | ••• |
••• | ••• | 17 |
388 |
FEB | 0.135 | 0.073 |
••• | ••• |
••• | ••• | 13 |
444 |
MAR | 0.149 | 0.055 |
••• | ••• |
••• | ••• | 16 |
453 |
APR | 0.213 | 0.108 |
••• | ••• |
••• | ••• | 20 |
533 |
MAY | 0.279 | 0.110 |
••• | ••• |
••• | ••• | 24 |
546 |
JUN | 0.311 | 0.117 |
••• | ••• |
••• | ••• | 24 |
764 |
JUL | 0.420 | 0.215 |
••• | ••• |
••• | ••• | 22 |
641 |
AUG | 0.410 | 0.315 |
••• | ••• |
••• | ••• | 22 |
640 |
SEP | 0.209 | 0.114 |
••• | ••• |
••• | ••• | 22 |
521 |
OCT | 0.176 | 0.130 |
••• | ••• |
••• | ••• | 21 |
513 |
NOV | 0.129 | 0.053 |
••• | ••• |
••• | ••• | 19 |
411 |
DEC | 0.124 | 0.090 |
••• | ••• |
••• | ••• | 14 |
253 |
YEAR | 0.221 | 0.110 |
••• | ••• |
••• | ••• | 234 |
6107 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2015 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2015 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.094 | 0.042 |
••• | ••• |
••• | ••• | 13 |
352 |
FEB | 0.108 | 0.039 |
••• | ••• |
••• | ••• | 15 |
422 |
MAR | 0.141 | 0.074 |
••• | ••• |
••• | ••• | 17 |
431 |
APR | 0.181 | 0.106 |
••• | ••• |
••• | ••• | 18 |
586 |
MAY | 0.330 | 0.166 |
••• | ••• |
••• | ••• | 25 |
559 |
JUN | 0.367 | 0.240 |
••• | ••• |
••• | ••• | 17 |
340 |
JUL | 0.422 | 0.233 |
••• | ••• |
••• | ••• | 23 |
584 |
AUG | 0.312 | 0.125 |
••• | ••• |
••• | ••• | 24 |
700 |
SEP | 0.292 | 0.267 |
••• | ••• |
••• | ••• | 18 |
603 |
OCT | 0.128 | 0.071 |
••• | ••• |
••• | ••• | 21 |
647 |
NOV | 0.088 | 0.042 |
••• | ••• |
••• | ••• | 16 |
503 |
DEC | 0.115 | 0.057 |
••• | ••• |
••• | ••• | 11 |
292 |
YEAR | 0.215 | 0.121 |
••• | ••• |
••• | ••• | 218 |
6019 |
|
GSFC (N 38°59', W 76°50', Alt 87 m )Year: 2016 Top | Site Index
Aerosol optical depth at 340 nm (taua340)
the associated standard deviations (sigma), the number of days (N) and number of observations in the period (Obs). (alpha and PW are only displayed for 500nm)
|
2016 Averages of |
taua340 | sigma |
alpha440-870 | sigma |
PW | sigma |
N | Obs |
|
JAN | 0.082 | 0.049 |
••• | ••• |
••• | ••• | 18 |
492 |
FEB | 0.088 | 0.041 |
••• | ••• |
••• | ••• | 15 |
387 |
MAR | 0.156 | 0.075 |
••• | ••• |
••• | ••• | 17 |
512 |
APR | 0.165 | 0.070 |
••• | ••• |
••• | ••• | 20 |
780 |
MAY | 0.309 | 0.139 |
••• | ••• |
••• | ••• | 16 |
346 |
JUN | 0.246 | 0.127 |
••• | ••• |
••• | ••• | 21 |
767 |
JUL | 0.314 | 0.126 |
••• | ••• |
••• | ••• | 25 |
594 |
AUG | 0.212 | 0.083 |
••• | ••• |
••• | ••• | 28 |
969 |
SEP | 0.259 | 0.137 |
••• | ••• |
••• | ••• | 19 |
612 |
OCT | 0.165 | 0.112 |
••• | ••• |
••• | ••• | 24 |
720 |
NOV | 0.129 | 0.119 |
••• | ••• |
••• | ••• | 22 |
767 |
DEC | 0.097 | 0.025 |
••• | ••• |
••• | ••• | 12 |
283 |
YEAR | 0.185 | 0.082 |
••• | ••• |
••• | ••• | 237 |
7229 |
|
|