2001 GOES-8/GOES-10/SURFRAD 2004 GOES-10/SURFRAD LST OBSERVATION CLR SKY DETECTION: Ming vs. Rama vs. Chuck Figure 1 from (Vinnikov et al., 2008) is reproduced using Ming Chen Clear Sky data. http://www.atmos.umd.edu/~kostya/Pdf/Vinnikov_et_al_GRL_2008.pdf We use indices: S or 1 – for SURFRAD LST G8 or 2 – for GOES-8 LST G10 or 3 - for GOES-10 LST Function Y(t), used to approximate diurnal and seasonal variations of LST, contains two first harmonics of annual and two first harmonics of diurnal cycles. Kostya Vinnikov 24 April, 2009

NUMBER OF CLR SKY OBSERVATIONS SURFRAD STATION 2001, GOES-8: CLR SKY MING/ MING & CHUCK 2001, GOES-10: 2001, COINSIDED GOES-8 & GOES-10: CLR SKY RAMA 2004, GOES-10: GDW 1,874 1,574 610 523 406 359 510 561 467 DRA 2,341 2,130 2,483 2,366 1,593 1,534 3,191 5,469 5,092 BON 1,781 1,394 1,615 1,423 1,007 878 1,160 3,040 2,610 TBL 1,648 1,502 1,484 1,370 1,014 931 1,350 2,917 2,577 FPK 1,665 1,386 1,622 1,402 1,128 962 1,360 3,016 2,467

ONLY COINCIDED GOES-8 & GOES-10 ALL CLR SKY GOES-8 & GOES-10 Fig. 1 (Vinnikov et al., 2008) CLR SKY BY RAMA ONLY COINCIDED GOES-8 & GOES-10 CLR SKY 2001 DATA ARE USED THE SAME Figure CLR SKY BY MING ALL CLR SKY GOES-8 & GOES-10 2001 DATA ARE USED

ONLY COINCIDED GOES-8 & GOES-10 ONLY COINCIDED GOES-8 & GOES-10 Fig. 1 (Vinnikov et al., 2008) CLR SKY BY RAMA ONLY COINCIDED GOES-8 & GOES-10 CLR SKY 2001 DATA ARE USED THE SAME Figure CLR SKY BY MING ONLY COINCIDED GOES-8 & GOES-10 CLR SKY 2001 DATA ARE USED

ALL CLR SKY GOES-8 & GOES-10 ONLY COINCIDED GOES-8 & GOES-10 THE SAME Figure CLR SKY BY MING ALL CLR SKY GOES-8 & GOES-10 2001 DATA ARE USED THE SAME Figure CLR SKY BY MING ONLY COINCIDED GOES-8 & GOES-10 CLR SKY 2001 DATA ARE USED

ONLY COINCIDED GOES-8 & GOES-10 ONLY COINCIDED GOES-8 & GOES-10 Fig. 1 (Vinnikov et al., 2008) CLR SKY BY RAMA ONLY COINCIDED GOES-8 & GOES-10 CLR SKY 2001 DATA ARE USED THE SAME Figure CLR SKY BY MING & CHUCK ONLY COINCIDED GOES-8 & GOES-10 CLR SKY 2001 DATA ARE USED

ALL CLR SKY GOES-8 & GOES-10 ALL CLR SKY GOES-8 & GOES-10 2001: CLR SKY BY MING ALL CLR SKY GOES-8 & GOES-10 DATA ARE USED 2001: CLR SKY BY MING & CHUCK ALL CLR SKY GOES-8 & GOES-10 DATA ARE USED

MING & CHUCK: 2004 vs. 2001

ALL CLR SKY GOES-10 2001 & 2004 DATA ARE USED CLR SKY BY MING ALL CLR SKY GOES-10 2001 & 2004 DATA ARE USED

CLR SKY BY MING & CHUCK GOES-10 2001 & 2004

A=YG(2001)-YS(2001); B=YG(2004)-YS(2004) Diurnal-seasonal pattern of A, B, B-A Statistic of differences (B-A) SURFRAD STATION MING MEAN, ºC STD, ºC Ming & Chuck MEAN, GDW 0.16 0.71 0.12 DRA -0.52 0.35 -0.51 0.37 BON -0.36 0.59 -0.38 0.61 TBL -0.42 0.78 -0.45 0.81 FPK -0.49 0.92 -0.48 1.04