1958 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	172.8	173.7	172.7	173.7	174.1	177.0	178.6	181.8	183.0	182.3	184.3	187.9	190.2	187.8	185.3	185.8	186.9	186.9	183.4	182.9	182.2	182.8	182.6	182.6	185.6	187.4	186.7	187.5	192.0	191.5	-9999.0
34	Hudson Bay	215.5	214.9	214.2	213.6	208.3	207.3	206.4	204.3	211.4	207.6	201.6	205.4	225.6	236.0	226.0	215.1	217.2	224.3	220.6	220.2	216.5	214.0	210.3	202.8	199.5	203.0	204.1	192.6	199.2	197.7	-9999.0
36	Hudson Strait	184.5	196.6	205.6	200.5	157.8	155.1	186.6	195.3	190.0	187.1	179.5	151.1	171.0	193.1	217.4	217.7	159.1	179.7	171.5	166.7	176.4	181.7	192.0	183.5	181.5	164.2	185.8	208.3	210.0	208.6	-9999.0
98	Bering Strait	186.2	190.0	186.2	187.4	185.5	191.1	187.8	179.2	182.1	188.7	194.0	195.7	188.9	187.6	184.9	182.1	177.3	179.5	172.1	181.0	179.2	186.0	202.4	209.1	215.1	218.7	218.6	219.8	215.2	213.8	-9999.0
128	Arctic subocean	109.5	118.3	107.8	98.5	101.4	100.8	106.6	117.9	112.7	116.8	119.6	121.4	131.0	133.7	122.7	121.3	134.7	136.9	125.0	126.9	127.0	126.9	137.7	132.1	126.0	138.2	145.5	144.5	147.7	157.4	-9999.0
130	Chukchi Sea	168.4	175.0	173.7	171.4	177.9	177.9	175.0	170.6	174.0	177.1	179.2	175.0	171.1	162.1	159.8	156.4	153.5	154.0	167.4	178.7	167.8	187.8	207.5	212.0	227.0	228.4	229.1	217.3	206.1	193.3	-9999.0
132	Beaufort Sea	188.1	188.2	195.4	200.4	203.1	203.2	205.0	204.9	196.1	192.1	200.7	218.2	211.8	196.4	193.8	197.4	198.4	204.2	201.4	202.0	199.7	195.6	195.4	200.4	207.3	213.2	208.2	216.4	214.0	195.7	-9999.0
134	Arctic Archipelago	126.5	126.3	126.2	144.5	157.6	149.9	135.6	145.0	143.0	129.7	137.1	138.6	136.8	132.4	126.9	124.6	139.4	160.9	169.5	172.2	165.1	147.6	151.9	164.7	161.6	141.0	140.9	155.2	160.1	151.4	-9999.0
136	Foxe Basin	151.0	156.0	162.8	157.0	154.4	171.3	177.9	152.7	156.6	158.1	124.9	119.1	123.2	133.4	146.2	134.3	119.3	136.0	154.1	155.7	164.9	157.7	138.6	146.6	160.1	154.1	150.6	161.9	136.1	180.9	-9999.0
138	Baffin Bay	128.3	113.8	101.8	104.3	116.3	126.6	129.9	139.3	120.9	114.9	131.4	139.8	130.7	114.8	129.7	135.8	147.2	116.2	103.9	111.4	121.0	124.4	118.6	113.8	124.5	130.1	141.7	133.4	153.6	142.4	-9999.0
139	South Greenland	170.4	159.9	163.9	176.4	177.3	183.6	181.8	183.1	185.0	180.7	174.5	165.4	147.7	143.8	154.6	171.6	166.5	150.0	148.1	154.3	169.7	171.7	149.9	145.8	155.0	158.9	160.6	164.4	166.6	171.0	-9999.0
140	Greenland Sea	126.6	138.5	110.9	108.8	108.6	118.8	111.3	135.0	131.5	115.7	134.7	140.1	138.8	137.5	126.6	131.4	150.2	158.8	146.0	146.1	149.1	164.0	161.9	146.9	154.2	158.9	158.9	163.3	167.7	169.1	-9999.0
142	Norwegian Sea	205.5	210.5	218.5	218.2	215.1	202.4	200.4	197.0	193.8	204.3	219.6	230.0	225.5	231.1	221.8	219.5	214.3	211.8	220.5	228.2	229.3	226.3	216.8	225.0	229.0	224.5	231.0	235.2	236.7	232.0	-9999.0
144	Barents Sea	193.3	204.5	207.2	214.5	211.1	209.8	214.9	205.6	197.7	203.5	205.2	200.3	203.5	197.0	183.5	199.8	211.4	202.1	202.2	195.3	188.9	192.7	196.6	201.4	206.9	214.0	219.7	229.3	233.9	235.8	-9999.0
146	Kara Sea	172.1	173.1	168.3	164.0	168.7	176.2	180.3	190.6	197.1	197.3	200.9	208.6	208.3	200.7	204.1	201.4	198.3	195.2	189.8	187.1	188.9	189.4	187.8	185.9	188.8	188.3	180.5	178.1	183.7	187.3	-9999.0
148	Laptev Sea	151.5	151.4	154.5	155.3	152.7	153.7	156.6	159.0	157.7	161.4	164.1	168.4	176.3	178.8	165.9	172.0	181.0	178.9	169.8	169.0	160.1	159.7	165.9	173.5	176.8	180.6	180.5	180.5	190.9	193.6	-9999.0
150	East Siberian Sea	145.8	149.7	150.0	148.9	150.0	151.2	153.3	158.3	167.7	168.3	163.2	158.6	163.2	162.5	163.2	164.2	162.3	165.7	176.2	164.7	174.0	178.5	165.7	155.6	156.2	164.4	173.9	184.0	187.2	186.4	-9999.0
152	Gulf of Alaska	219.0	214.1	208.3	210.7	212.3	216.2	213.4	209.6	208.5	212.2	217.9	211.6	205.3	206.5	206.3	205.5	203.2	200.7	193.4	194.1	191.2	194.2	213.9	217.1	216.2	225.6	224.2	226.1	227.4	230.5	-9999.0
154	Southeast Bering Sea	212.9	209.8	213.6	216.6	218.2	222.1	218.7	210.6	207.2	214.2	210.0	209.8	207.5	207.9	207.8	199.2	192.7	180.8	184.2	200.7	188.0	225.9	232.0	231.0	233.3	237.5	237.8	235.6	233.7	238.0	-9999.0