Table 1 2011–2012 area-averaged cloud fraction and cloud effects on the ice sheet SEB, SMB, and surface meteorological conditions calculated by NHM–SMAP. P, T, and q represent surface pressure, 2 m air temperature, and 2 m water vapour mixing ratio, respectively (w.e. means “water equivalent”).

From: Cloud-driven modulations of Greenland ice sheet surface melt

 

Entire ice sheet

Southern and western ablation areas

1112_MAM

1112_JJA

1112

1112_MAM

1112_JJA

1112

Cloud fraction

0.50

0.46

0.54

0.48

0.39

0.46

CRE (W m2)

19.0

18.8

20.8

19.3

−2.3

16.2

ΔSnet (W m−2)

−5.3

−12.0

−4.7

−9.0

−23.1

−8.8

ΔLnet (W m−2)

24.3

30.7

25.5

28.3

20.8

25.0

ΔHS (W m−2)

−1.8

0.3

−2.0

0.4

0.3

1.1

ΔHL (W m−2)

−3.4

−8.8

−5.0

−6.2

−24.1

−13.1

ΔM (W m−2)

0.0

−2.1

−0.5

−0.8

−26.3

−6.8

ΔRU (mm w.e. day−1)

−0.02

−0.91

−0.22

−0.42

−7.46

−1.82

ΔSUs (mm w.e. day−1)

0.02

0.11

0.04

0.11

0.32

0.21

ΔSUds (mm w.e. day−1)

0.01

0.01

0.02

0.00

0.00

0.04

ΔP (hPa)

−0.3

−0.3

−0.2

−0.6

−0.2

−0.6

ΔT (K)

2.4

1.3

2.4

0.5

−0.2

0.6

Δq (g kg−1)

0.1

−0.1

0.0

−0.1

−0.9

−0.3

  1. All values except those for cloud fraction were obtained by subtracting the clear-sky simulation results from the all-sky simulation results. Each result is area-averaged over the entire ice sheet as well as over the low-elevation (<1000 m a.s.l.) ablation areas of the southern and western regions of the ice sheet (see Fig. 1) during March–May 2012 (1112_MAM), June–August 2012 (1112_JJA), and September 2011 to August 2012 (1112).