1971 04 - daily  - mean of NCEP mean Daily Downward Longwave Radiation 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	184.5	189.9	192.9	195.2	197.0	199.1	198.5	200.2	201.1	204.0	204.3	205.2	206.0	210.4	214.9	220.7	220.3	222.0	222.4	215.9	216.4	218.5	224.4	226.4	229.7	227.3	224.5	226.5	224.4	226.2	-9999.0
34	Hudson Bay	205.9	208.3	215.0	208.2	212.6	227.4	232.2	240.5	221.3	229.8	238.2	225.4	207.1	214.6	236.9	263.9	255.0	256.1	265.4	263.9	260.3	257.6	258.5	252.5	249.6	239.9	237.3	242.8	241.4	238.6	-9999.0
36	Hudson Strait	221.2	200.8	222.8	208.5	231.1	215.5	192.4	165.7	209.7	189.8	186.0	223.1	218.2	195.6	188.9	197.7	230.3	236.4	246.1	227.4	226.7	255.2	268.9	283.6	260.1	238.2	227.8	219.6	214.8	207.7	-9999.0
98	Bering Strait	170.5	167.1	178.9	203.6	203.7	202.1	206.3	191.4	185.0	198.2	197.1	214.4	231.5	237.0	228.2	210.9	218.8	218.4	210.4	203.3	197.2	204.2	224.4	235.8	237.9	241.0	230.4	221.0	212.8	206.1	-9999.0
128	Arctic subocean	130.3	128.8	121.6	110.9	125.7	141.6	149.7	160.1	157.9	144.1	142.7	138.4	127.8	130.8	136.8	138.5	146.5	155.3	177.8	199.4	189.2	186.9	184.3	181.9	199.2	195.2	193.4	184.6	177.0	169.4	-9999.0
130	Chukchi Sea	139.6	151.9	150.5	152.5	174.5	181.2	161.0	153.3	175.6	164.4	151.8	166.3	219.3	213.3	228.0	207.1	217.1	212.8	198.7	196.7	195.4	198.7	192.4	192.5	208.6	211.7	242.3	204.0	177.8	184.1	-9999.0
132	Beaufort Sea	182.6	197.5	192.9	216.2	216.5	230.4	233.3	208.6	194.0	203.1	201.2	205.5	220.1	235.6	240.4	224.4	218.1	214.8	220.8	232.8	260.9	244.5	257.7	254.2	246.1	244.8	239.4	242.6	240.4	236.1	-9999.0
134	Arctic Archipelago	152.4	149.9	152.9	146.1	146.2	159.8	163.8	155.3	146.5	146.9	149.9	161.7	152.1	161.9	166.7	180.6	200.4	226.3	220.6	200.8	214.7	234.7	213.3	202.6	212.9	220.2	241.1	222.2	218.0	206.8	-9999.0
136	Foxe Basin	169.9	160.7	140.7	163.4	185.9	190.3	179.5	172.0	195.0	192.8	168.2	150.6	171.4	191.3	208.9	174.6	202.8	238.4	226.4	186.4	187.5	191.0	188.1	197.9	194.6	190.9	205.3	219.4	210.9	209.2	-9999.0
138	Baffin Bay	129.4	134.7	117.3	109.4	103.1	97.3	99.2	115.1	121.3	109.4	110.7	125.5	128.2	115.1	125.8	130.8	120.2	139.6	158.0	149.1	152.4	149.8	146.6	151.2	159.7	162.3	176.5	186.1	184.2	178.9	-9999.0
139	South Greenland	163.5	164.9	187.4	172.6	152.4	139.9	145.7	140.5	146.3	159.6	167.8	161.2	157.8	153.3	164.8	171.2	154.9	156.0	157.9	152.5	152.7	160.2	181.1	188.6	200.9	214.2	201.4	191.5	194.9	193.3	-9999.0
140	Greenland Sea	109.2	114.8	122.0	140.9	143.5	132.6	127.0	118.3	120.6	116.6	123.3	117.8	121.0	119.0	117.2	132.9	170.5	166.3	151.7	154.2	166.5	151.4	142.6	141.5	149.8	160.5	163.3	159.7	166.5	160.1	-9999.0
142	Norwegian Sea	242.4	269.4	224.2	237.4	240.4	241.4	256.0	262.9	257.2	253.0	283.5	249.7	240.3	266.8	278.1	281.1	267.7	271.7	262.5	250.8	245.8	239.2	239.5	227.5	212.3	239.5	241.9	232.9	223.6	246.1	-9999.0
144	Barents Sea	249.6	211.0	235.1	230.6	223.5	211.0	198.3	234.4	257.1	263.3	241.3	252.5	257.4	241.6	213.2	206.8	211.3	228.0	243.3	246.4	238.6	206.4	212.3	207.0	191.1	192.7	217.1	235.9	231.6	244.3	-9999.0
146	Kara Sea	192.4	208.8	206.1	207.2	216.2	217.6	214.3	220.3	223.8	215.3	217.9	221.7	225.7	232.3	238.9	242.8	244.5	242.3	225.5	214.3	214.8	227.4	234.2	240.7	246.2	242.1	232.4	232.8	231.7	243.5	-9999.0
148	Laptev Sea	173.4	179.5	181.1	182.7	182.3	183.4	185.8	193.4	202.3	214.5	204.6	194.4	195.9	205.5	213.7	234.9	218.4	215.4	235.5	221.9	204.7	201.2	204.7	202.3	214.2	215.0	211.3	224.5	228.2	226.4	-9999.0
150	East Siberian Sea	177.4	182.4	190.9	197.3	188.0	178.8	174.5	178.4	186.2	202.5	203.5	194.9	189.4	185.1	174.6	170.3	174.0	174.6	177.8	175.9	191.2	198.3	221.8	250.1	244.6	225.0	218.4	227.7	216.9	219.4	-9999.0
152	Gulf of Alaska	208.7	215.3	242.3	244.8	237.5	237.4	228.1	209.8	202.7	202.4	235.6	263.3	263.7	257.4	228.7	241.8	249.2	250.7	231.3	220.0	215.8	256.9	250.9	232.0	275.9	268.1	248.3	227.8	237.3	237.7	-9999.0
154	Southeast Bering Sea	188.1	220.1	191.6	203.2	193.4	196.6	205.5	185.7	176.6	192.5	228.9	262.6	238.3	256.3	224.7	201.7	266.3	239.5	216.0	225.3	227.2	225.0	239.8	234.3	272.5	257.0	236.3	234.8	195.8	204.6	-9999.0