1981 04 - daily  - mean of NCEP mean Daily Clear Sky Downward Longwave Flux at surface, W/m^2.
BasinID	Name	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
0	Pan Arctic	181.5	179.5	178.2	173.8	173.4	175.1	176.6	177.3	178.3	179.0	179.1	177.2	178.5	182.7	188.8	193.8	195.4	196.6	197.5	197.2	200.3	203.5	207.3	208.6	206.5	205.6	203.7	202.2	199.7	200.5	-9999.0
34	Hudson Bay	201.5	198.9	195.1	189.2	193.7	202.8	201.4	200.0	197.6	196.4	190.3	190.6	190.8	181.1	186.0	209.3	202.7	190.1	187.1	191.7	211.0	220.0	224.0	228.2	227.3	233.1	233.4	232.0	225.4	222.4	-9999.0
36	Hudson Strait	154.0	187.3	163.6	150.0	149.1	171.9	178.1	170.1	172.5	187.6	182.8	175.6	174.7	204.5	155.4	136.3	146.5	143.2	166.2	178.8	182.9	219.4	227.8	222.0	223.3	214.0	210.8	207.0	209.1	209.1	-9999.0
98	Bering Strait	177.5	180.4	174.2	170.5	168.2	169.4	172.8	171.5	173.9	173.0	180.0	173.5	166.4	163.8	163.7	162.5	166.6	174.7	189.2	191.7	194.9	197.3	196.3	198.3	200.1	204.4	206.1	210.6	211.8	213.2	-9999.0
128	Arctic subocean	124.8	127.1	122.6	117.6	116.1	117.8	119.5	126.0	136.2	125.8	126.8	133.0	139.1	131.4	124.0	135.7	135.9	149.7	153.4	144.7	149.7	155.1	159.0	146.8	145.8	149.1	149.8	151.4	153.2	153.9	-9999.0
130	Chukchi Sea	180.9	184.5	180.8	168.4	159.0	159.6	168.5	176.2	166.3	196.0	210.1	198.5	175.6	167.1	168.5	171.8	170.3	172.8	178.4	180.2	177.8	182.4	178.7	176.6	184.4	186.7	192.5	212.6	212.7	219.9	-9999.0
132	Beaufort Sea	189.3	192.1	195.5	188.8	193.1	189.9	182.5	179.0	177.1	169.8	166.0	156.7	154.7	165.3	177.6	181.7	179.4	178.0	197.0	222.3	220.0	215.7	221.5	226.8	216.6	213.3	214.5	221.0	222.3	223.6	-9999.0
134	Arctic Archipelago	138.1	138.1	140.6	140.6	141.4	138.7	137.0	142.5	144.5	142.3	134.5	126.8	131.2	138.5	138.2	138.5	143.1	153.5	156.6	160.8	159.8	160.7	173.1	183.4	190.5	191.7	187.3	183.8	184.9	188.7	-9999.0
136	Foxe Basin	125.5	128.3	130.7	135.4	137.3	146.3	146.3	137.8	138.8	149.2	154.4	156.4	146.2	141.8	142.7	144.3	146.4	137.5	136.2	154.8	189.8	195.6	211.4	220.7	214.3	206.4	200.1	185.5	186.0	184.1	-9999.0
138	Baffin Bay	123.6	119.9	110.5	103.8	114.7	113.6	105.5	101.3	98.6	91.9	99.9	106.6	109.8	109.6	146.1	149.6	155.2	160.0	129.4	120.2	146.1	171.9	164.6	152.1	141.4	133.6	130.8	131.5	142.1	154.9	-9999.0
139	South Greenland	129.8	128.7	151.0	165.6	157.7	140.5	132.7	122.4	119.8	117.1	115.0	127.0	142.0	157.8	179.6	172.2	174.5	169.8	149.2	170.8	182.7	179.1	177.7	173.8	169.3	171.3	182.7	177.7	168.7	161.1	-9999.0
140	Greenland Sea	128.0	119.8	124.2	115.8	114.1	114.5	120.0	125.7	122.9	117.7	111.9	114.4	119.6	114.5	149.4	155.6	142.0	157.2	141.9	114.7	122.9	134.9	154.5	142.1	127.2	125.6	125.5	120.3	116.6	124.6	-9999.0
142	Norwegian Sea	222.6	239.2	231.5	219.1	223.7	226.0	227.8	229.0	233.8	240.7	226.7	231.3	219.0	225.5	214.1	210.0	224.1	216.7	214.9	212.7	190.3	193.1	193.6	194.3	195.9	201.3	198.8	198.2	209.8	208.3	-9999.0
144	Barents Sea	192.3	205.2	218.1	200.3	192.2	208.3	205.4	185.2	170.8	181.3	205.4	196.2	197.7	199.0	191.4	187.3	189.9	205.4	204.3	208.3	204.5	204.7	197.5	191.4	189.4	194.0	196.6	207.8	231.9	235.5	-9999.0
146	Kara Sea	199.5	194.3	186.7	185.5	189.4	190.6	199.7	209.5	214.5	215.1	211.3	210.3	210.2	213.6	217.4	222.2	224.9	227.4	232.7	223.3	219.7	222.3	229.1	229.4	224.7	218.6	209.9	209.9	206.3	207.3	-9999.0
148	Laptev Sea	183.7	176.1	175.0	163.8	151.6	151.0	155.0	162.9	168.1	171.8	174.3	172.4	178.1	188.7	198.3	204.9	212.4	211.3	203.5	194.5	196.4	197.3	199.4	205.2	207.5	208.0	209.0	189.3	174.6	177.4	-9999.0
150	East Siberian Sea	167.9	155.8	162.8	167.1	170.8	169.1	159.8	140.7	141.8	149.4	159.3	158.2	163.1	182.1	193.4	191.5	187.6	189.7	193.2	187.5	183.4	180.3	182.6	184.0	186.9	187.6	184.9	192.3	194.4	185.2	-9999.0
152	Gulf of Alaska	199.9	202.2	191.4	189.8	183.9	185.2	191.0	187.8	188.2	175.9	176.8	177.3	184.1	182.8	181.4	183.0	190.5	204.7	219.6	216.4	214.7	212.3	210.5	212.3	213.4	211.0	209.0	213.8	213.9	216.9	-9999.0
154	Southeast Bering Sea	213.0	201.0	200.5	196.4	191.6	211.0	209.7	202.5	212.8	207.6	208.9	203.7	189.2	179.0	175.0	179.4	196.9	215.2	220.2	216.7	216.4	212.1	208.4	209.8	220.5	218.3	211.7	225.9	221.4	231.9	-9999.0