1957 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	179.2	179.5	178.6	176.7	177.0	177.1	174.9	176.3	179.5	181.4	181.8	184.6	187.5	187.6	190.0	190.0	187.5	188.9	189.0	189.0	189.6	193.1	195.1	196.0	196.4	195.6	197.0	199.6	202.9	205.8	-9999.0
34	Hudson Bay	179.2	167.5	183.3	196.3	198.6	191.4	180.1	179.8	177.3	177.2	178.9	187.9	194.0	193.9	204.5	209.8	206.3	214.0	229.0	227.6	217.8	230.2	243.0	242.2	239.3	233.0	228.1	229.6	242.0	246.5	-9999.0
36	Hudson Strait	163.9	166.2	153.7	159.1	166.9	181.0	191.1	195.6	201.3	214.3	223.4	199.8	171.8	160.7	157.4	163.8	170.7	177.5	185.4	204.2	188.8	159.7	156.6	163.8	191.7	230.3	240.0	224.0	191.5	177.6	-9999.0
98	Bering Strait	186.5	189.0	185.7	181.4	187.0	198.7	194.0	192.6	189.1	195.5	201.7	210.8	200.4	187.3	186.9	188.3	192.0	195.9	200.5	199.3	197.5	197.0	192.2	194.2	200.6	199.7	196.3	192.1	185.7	188.1	-9999.0
128	Arctic subocean	116.9	127.1	126.8	129.7	129.5	119.7	111.7	111.9	113.3	111.5	112.8	117.6	125.5	130.8	132.7	129.4	132.2	133.2	129.8	139.9	136.0	125.3	131.1	133.1	135.2	141.0	144.0	140.1	135.1	130.1	-9999.0
130	Chukchi Sea	167.5	166.9	160.8	167.9	186.4	206.6	203.5	210.1	199.8	205.6	217.5	220.1	199.9	182.4	179.7	191.6	203.9	208.9	208.9	203.2	199.6	187.5	184.6	186.6	187.5	182.1	177.7	173.9	176.5	174.9	-9999.0
132	Beaufort Sea	178.9	192.8	197.0	189.6	184.3	179.2	183.7	178.8	175.6	166.2	167.4	177.0	190.4	196.4	204.5	208.3	212.0	209.2	200.8	192.0	196.7	204.2	198.4	196.0	199.1	204.0	212.8	216.1	212.3	209.5	-9999.0
134	Arctic Archipelago	141.5	153.7	159.2	152.2	144.9	145.5	142.7	141.4	148.5	149.6	148.9	155.8	162.9	169.5	184.8	189.6	179.8	173.5	157.7	145.4	144.4	150.4	155.5	150.1	150.8	158.8	174.2	179.0	169.2	159.5	-9999.0
136	Foxe Basin	141.7	143.9	150.6	158.7	164.1	170.1	175.6	177.8	172.0	183.5	178.3	156.0	158.1	154.0	157.6	164.0	171.9	159.3	159.0	168.9	154.6	145.2	149.1	161.7	152.2	149.1	152.7	162.1	165.3	171.9	-9999.0
138	Baffin Bay	135.9	138.7	132.5	128.2	120.9	130.3	135.9	129.9	133.1	122.7	104.1	97.9	102.4	111.3	109.3	118.2	115.8	115.6	120.6	123.4	117.1	124.6	138.9	147.4	149.2	133.0	119.1	112.1	106.1	108.6	-9999.0
139	South Greenland	175.8	165.6	153.5	148.9	166.4	188.6	184.1	172.5	170.5	180.7	177.3	170.3	167.0	159.7	157.6	151.9	142.3	144.1	142.8	141.4	139.8	144.6	151.1	169.1	168.2	150.3	154.1	158.2	173.1	183.2	-9999.0
140	Greenland Sea	135.1	148.4	140.3	126.5	113.4	119.1	130.1	132.7	119.1	115.1	108.3	112.9	124.8	132.6	135.8	143.9	143.6	135.0	124.0	118.9	117.7	119.9	130.4	139.7	158.9	143.5	133.9	125.7	121.3	123.8	-9999.0
142	Norwegian Sea	229.2	231.1	236.2	245.4	240.5	217.9	213.9	209.0	212.0	202.7	195.1	196.7	196.7	194.7	205.7	220.5	233.5	238.7	230.4	223.6	230.6	237.1	238.0	237.5	224.9	230.2	234.5	234.3	223.0	209.4	-9999.0
144	Barents Sea	188.4	174.8	174.9	194.7	212.6	214.5	207.4	185.0	183.8	202.6	199.6	199.6	202.8	194.2	195.1	200.5	208.9	212.6	218.6	234.9	246.3	241.4	234.8	230.0	230.0	227.6	229.0	239.8	245.7	253.7	-9999.0
146	Kara Sea	191.7	192.6	185.8	177.7	175.5	176.7	180.4	195.6	206.4	206.5	207.9	209.3	211.4	211.2	207.9	197.0	191.3	197.2	196.2	197.0	201.6	205.4	205.9	203.6	200.8	200.8	203.8	207.0	213.7	221.1	-9999.0
148	Laptev Sea	179.8	184.5	185.8	179.5	174.8	166.4	158.3	154.1	161.7	166.7	165.8	167.4	175.5	183.1	187.9	191.9	184.6	176.8	170.7	168.9	171.2	175.5	174.8	178.9	181.0	184.1	184.2	190.6	195.9	197.0	-9999.0
150	East Siberian Sea	181.8	176.4	170.2	171.7	168.2	162.5	157.6	158.7	163.6	166.3	169.7	176.2	171.8	169.5	166.4	165.3	166.8	170.3	175.6	183.3	184.7	185.1	186.4	185.4	182.8	182.2	185.8	189.0	194.3	195.6	-9999.0
152	Gulf of Alaska	210.1	213.1	205.7	194.9	193.3	210.4	205.8	200.7	196.0	196.3	196.6	204.6	203.8	205.1	202.4	206.1	205.3	203.1	202.8	205.7	212.4	213.0	209.7	215.4	217.7	216.1	212.5	208.0	204.3	201.3	-9999.0
154	Southeast Bering Sea	219.5	208.4	186.2	187.4	213.6	217.1	204.0	221.2	217.7	221.1	233.8	233.5	217.6	200.8	198.4	217.4	222.1	221.4	218.0	217.1	219.5	214.7	220.4	228.2	221.7	220.2	218.2	218.5	214.2	210.8	-9999.0