1977 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	167.0	169.5	171.5	174.3	178.6	184.0	188.2	191.6	191.5	187.9	187.1	187.4	188.4	190.6	195.1	201.4	201.8	196.2	192.3	192.3	192.9	195.6	201.0	204.5	206.6	206.1	204.0	205.3	208.9	208.6	-9999.0
34	Hudson Bay	185.6	177.6	170.2	171.2	173.9	176.1	175.2	190.5	217.7	226.3	221.5	214.7	220.9	230.4	236.1	239.3	240.7	231.4	225.8	228.1	225.1	223.0	221.1	222.2	230.7	231.7	218.0	210.9	231.9	238.9	-9999.0
36	Hudson Strait	163.9	172.0	189.7	184.2	152.7	166.5	165.9	141.1	143.6	147.5	189.1	185.2	174.4	183.6	179.5	187.3	185.9	193.0	205.8	203.1	214.1	199.2	180.6	183.1	180.6	190.6	172.9	169.9	168.9	169.8	-9999.0
98	Bering Strait	149.4	183.9	181.2	185.3	185.7	176.0	175.3	170.1	170.0	179.4	170.6	173.2	170.7	169.7	172.5	183.1	181.6	185.3	185.2	197.1	207.2	203.2	205.6	208.1	203.9	195.9	189.1	180.1	180.6	192.5	-9999.0
128	Arctic subocean	139.6	135.4	124.6	121.0	120.2	133.5	144.7	146.4	135.3	124.4	130.6	136.0	133.9	130.5	141.8	144.4	148.7	158.1	159.2	154.5	152.0	145.2	139.9	145.8	149.7	152.2	148.2	145.9	147.2	153.6	-9999.0
130	Chukchi Sea	136.2	138.5	132.5	138.3	155.3	146.8	146.6	153.6	137.3	132.3	139.7	140.2	152.2	158.7	158.2	163.3	173.1	175.6	181.0	190.5	194.2	189.4	204.9	204.4	185.6	175.3	172.7	175.1	184.5	175.9	-9999.0
132	Beaufort Sea	159.2	161.1	191.5	190.9	195.8	193.1	199.5	214.0	210.3	192.8	199.1	203.1	210.1	201.6	195.4	203.2	196.1	194.7	192.8	193.7	199.6	207.2	223.0	238.1	242.5	233.6	223.1	213.4	199.4	193.9	-9999.0
134	Arctic Archipelago	138.8	133.9	130.9	130.7	132.9	132.9	140.0	148.9	163.1	161.7	154.8	172.9	178.4	178.5	190.2	194.8	193.8	185.7	184.0	180.1	171.2	171.4	183.2	187.7	178.2	177.6	184.8	194.4	195.0	186.3	-9999.0
136	Foxe Basin	151.1	145.7	143.8	158.7	154.2	150.5	164.2	166.6	148.8	165.7	187.2	172.9	175.2	174.1	172.5	186.3	207.3	205.4	198.7	181.8	173.5	161.5	163.0	160.5	155.8	159.3	159.9	175.7	179.7	175.5	-9999.0
138	Baffin Bay	149.3	144.0	130.7	117.9	127.7	155.9	171.2	172.2	145.4	134.3	136.0	127.7	126.4	129.7	125.6	120.5	128.0	128.3	137.1	139.8	141.4	136.1	130.0	128.7	132.5	130.3	131.2	133.4	146.7	155.2	-9999.0
139	South Greenland	152.8	161.5	157.6	141.5	151.3	174.5	192.4	171.4	141.8	133.5	137.9	134.0	132.2	129.6	141.1	143.3	146.6	146.4	147.4	144.2	144.5	138.9	139.4	137.6	136.6	143.2	149.4	150.2	157.6	177.4	-9999.0
140	Greenland Sea	112.5	123.1	120.0	101.3	102.1	136.3	155.3	168.7	153.4	130.4	118.2	120.5	116.5	117.1	113.1	111.5	107.6	110.9	117.7	116.0	124.2	127.5	124.5	120.2	116.4	128.7	127.3	124.6	122.1	139.7	-9999.0
142	Norwegian Sea	216.6	213.5	198.7	191.5	199.5	193.5	180.4	182.1	189.2	188.1	207.9	220.0	218.3	214.6	211.3	203.1	201.9	203.6	210.0	217.6	223.4	222.5	204.5	200.4	205.3	216.9	224.6	228.4	227.3	227.3	-9999.0
144	Barents Sea	187.5	205.3	214.3	209.3	193.6	187.3	186.6	202.8	213.8	196.2	180.8	195.4	206.9	212.8	212.7	214.7	217.3	215.6	218.0	221.7	217.6	217.3	230.7	230.8	238.1	247.0	247.3	249.8	256.1	239.9	-9999.0
146	Kara Sea	180.0	167.2	173.7	186.8	198.7	209.3	214.1	214.4	205.6	201.5	203.5	201.8	203.9	210.9	220.0	229.7	223.3	218.9	218.8	211.9	210.9	219.3	224.0	227.3	231.2	230.0	230.3	234.1	233.4	232.0	-9999.0
148	Laptev Sea	152.8	173.4	169.1	170.7	180.1	183.7	184.3	186.7	188.0	185.3	184.1	183.1	177.2	171.5	177.7	187.4	200.0	172.8	149.2	159.0	164.1	173.2	185.8	190.5	190.3	188.8	190.2	201.6	202.3	190.4	-9999.0
150	East Siberian Sea	167.1	170.9	174.1	181.1	172.8	175.5	181.5	179.4	181.5	181.7	180.8	183.8	178.2	176.9	174.2	175.8	176.3	185.6	176.6	164.3	158.9	157.2	161.0	167.8	170.9	176.3	186.5	192.3	202.8	204.2	-9999.0
152	Gulf of Alaska	198.9	235.7	222.6	226.0	209.6	203.4	209.4	198.2	203.9	207.3	193.0	197.8	174.0	179.7	184.3	191.7	194.1	197.4	202.3	222.1	226.9	220.3	224.8	232.3	230.5	212.8	200.3	191.4	196.3	220.0	-9999.0
154	Southeast Bering Sea	201.8	216.5	187.2	201.0	205.1	195.6	181.6	179.6	204.6	190.9	149.1	142.4	143.8	162.0	171.9	176.3	179.0	199.2	213.4	222.0	218.5	212.2	222.9	217.7	211.7	195.8	193.2	187.0	215.8	226.5	-9999.0