1970 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	175.2	173.7	172.8	172.5	174.6	176.0	175.8	175.9	178.6	181.4	182.3	184.1	184.9	185.6	188.2	190.1	187.4	182.0	180.9	182.3	186.6	187.9	187.7	189.3	190.5	192.3	192.8	193.4	194.3	193.7	-9999.0
34	Hudson Bay	174.2	179.3	170.4	171.1	180.1	180.1	193.2	192.1	191.6	191.9	193.1	198.2	200.1	201.1	202.6	201.3	200.7	200.8	206.5	208.2	206.9	212.8	220.9	227.1	226.2	227.5	223.4	221.8	221.3	223.5	-9999.0
36	Hudson Strait	167.6	163.6	159.9	167.6	162.4	152.5	148.3	145.6	155.5	176.4	196.7	188.6	184.1	177.7	172.3	160.5	165.0	167.3	170.2	173.1	183.3	182.9	192.0	214.3	218.2	220.9	212.9	195.4	182.3	185.7	-9999.0
98	Bering Strait	173.9	158.9	165.8	171.9	173.5	172.2	168.4	166.3	166.2	170.0	167.3	167.5	193.9	197.2	196.7	204.7	203.4	200.2	196.6	199.2	206.2	200.5	194.4	189.0	179.2	176.0	183.6	193.4	202.4	204.0	-9999.0
128	Arctic subocean	119.9	121.2	128.2	125.5	120.9	125.6	139.2	152.3	163.8	144.5	127.7	115.4	119.5	135.5	139.0	127.8	114.5	106.5	102.9	115.2	127.9	126.9	118.2	111.5	104.7	110.0	120.8	127.9	128.9	131.5	-9999.0
130	Chukchi Sea	157.5	142.4	135.9	140.4	148.2	149.8	148.3	140.0	140.4	140.6	139.6	145.4	165.4	167.1	180.8	203.9	206.7	206.2	207.0	204.3	212.8	196.7	184.8	176.1	169.0	170.5	175.6	176.7	177.8	177.5	-9999.0
132	Beaufort Sea	194.7	175.5	168.5	177.6	175.7	178.2	171.7	174.2	184.4	193.0	193.5	192.3	195.4	200.4	202.7	204.9	210.1	210.3	209.3	206.8	208.4	210.5	210.3	206.7	198.3	192.1	192.4	196.2	206.3	210.8	-9999.0
134	Arctic Archipelago	135.7	130.5	129.8	129.9	130.6	132.9	133.7	136.2	145.8	154.3	160.1	165.8	171.2	177.6	183.5	178.4	168.6	167.8	160.0	140.7	142.5	150.9	155.5	161.9	159.0	162.1	158.8	160.2	166.0	165.5	-9999.0
136	Foxe Basin	145.1	146.6	147.8	143.6	144.0	156.8	165.5	159.5	149.8	148.1	153.4	166.8	165.5	157.8	163.1	173.9	161.0	150.5	149.6	153.8	132.5	136.2	146.9	160.5	162.3	174.4	169.2	154.3	160.6	158.5	-9999.0
138	Baffin Bay	142.0	135.6	123.8	114.4	121.1	150.0	173.6	179.2	167.0	140.9	121.2	108.3	105.8	108.7	122.0	123.9	116.2	107.6	105.1	110.1	116.4	121.0	110.1	108.2	104.5	92.1	91.9	101.5	103.2	101.4	-9999.0
139	South Greenland	153.4	148.2	137.2	141.6	175.6	192.1	187.4	183.6	173.6	174.0	163.6	146.0	139.9	132.3	127.0	124.2	126.3	132.6	132.8	134.5	136.6	137.3	129.2	135.7	148.9	157.5	158.0	172.0	181.0	171.9	-9999.0
140	Greenland Sea	126.7	124.5	126.3	120.1	113.9	141.0	168.0	174.4	170.4	153.8	123.6	101.3	89.8	87.6	100.4	110.2	108.3	111.3	123.8	137.7	134.7	121.5	118.6	122.2	112.6	112.4	113.7	123.4	118.1	122.7	-9999.0
142	Norwegian Sea	196.2	194.4	196.7	202.5	204.4	207.5	206.9	215.5	214.3	208.5	208.2	212.9	210.6	204.9	213.1	235.0	235.7	230.3	227.2	218.4	214.1	213.9	218.6	221.5	217.7	217.5	220.1	213.9	215.3	222.4	-9999.0
144	Barents Sea	193.3	204.4	216.5	215.4	219.7	227.2	224.0	222.2	225.6	216.7	200.4	205.9	210.6	200.9	186.0	190.0	212.7	194.2	169.4	165.8	188.4	201.1	195.4	183.8	185.7	201.0	214.3	222.1	215.9	222.3	-9999.0
146	Kara Sea	206.2	204.5	198.9	195.6	198.2	195.1	187.2	187.7	195.2	205.4	212.6	210.5	203.0	206.7	216.3	212.3	191.0	187.5	194.2	199.8	200.2	189.8	186.2	200.0	207.9	206.2	204.3	203.9	202.6	196.9	-9999.0
148	Laptev Sea	153.7	158.7	169.3	165.9	157.8	152.9	151.0	149.4	150.9	156.2	166.3	180.2	183.1	179.2	176.0	188.1	201.4	176.6	163.2	165.8	182.9	201.7	201.4	179.1	184.3	195.7	191.4	180.9	180.9	181.2	-9999.0
150	East Siberian Sea	136.8	146.5	158.2	161.2	156.2	153.8	154.0	156.2	152.5	143.4	138.3	141.4	146.0	151.5	152.6	159.4	164.6	173.7	174.6	166.4	165.2	167.7	183.7	196.6	186.9	184.3	199.9	206.3	202.8	204.3	-9999.0
152	Gulf of Alaska	192.5	185.2	200.2	195.0	190.1	194.4	192.3	194.3	195.2	197.8	184.9	196.7	218.6	216.7	216.3	218.6	218.0	210.8	207.2	212.5	216.1	205.4	201.1	199.9	196.6	195.7	207.6	216.4	220.0	215.1	-9999.0
154	Southeast Bering Sea	190.9	177.5	162.9	155.9	156.7	164.0	178.9	181.7	174.7	164.6	165.3	217.7	224.2	217.7	218.1	226.2	223.5	217.3	214.6	229.5	216.6	206.6	207.3	198.0	188.3	199.1	215.8	218.8	222.8	220.0	-9999.0