1964 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	162.5	161.0	159.1	162.4	167.7	171.8	170.4	167.9	166.1	165.9	169.2	170.9	170.8	172.3	170.2	170.6	172.1	174.9	179.1	183.4	184.8	186.1	190.9	194.6	198.4	201.2	202.3	201.3	199.5	201.9	-9999.0
34	Hudson Bay	183.4	188.3	185.1	195.8	205.9	202.2	186.0	186.2	188.5	185.8	201.5	208.3	205.7	208.9	200.8	198.3	194.2	181.7	193.8	210.9	208.7	206.9	214.6	225.3	236.2	248.8	252.5	249.7	246.0	253.2	-9999.0
36	Hudson Strait	156.0	140.3	147.0	157.6	161.9	178.6	169.4	147.0	163.0	151.9	142.5	160.5	154.6	198.9	217.9	178.3	163.4	193.1	138.1	154.2	190.0	194.7	205.6	205.1	207.3	211.4	207.1	210.3	219.4	218.4	-9999.0
98	Bering Strait	162.5	159.3	159.2	152.3	175.6	186.9	187.5	192.5	193.0	182.3	173.0	172.0	168.8	165.6	164.4	178.2	189.5	187.2	178.0	177.8	180.0	181.2	186.2	184.7	173.8	171.1	169.7	173.9	176.6	175.9	-9999.0
128	Arctic subocean	117.0	109.5	114.0	125.2	114.4	99.7	98.1	102.1	110.6	107.3	102.2	114.9	120.0	123.2	121.1	112.5	111.2	116.4	132.0	146.1	124.1	120.1	130.3	138.1	139.5	141.5	135.1	129.4	131.1	152.7	-9999.0
130	Chukchi Sea	135.8	120.8	120.9	149.0	176.0	181.3	179.7	180.2	176.7	154.3	149.7	141.2	135.5	146.4	171.1	192.9	198.2	186.8	171.8	167.9	160.3	159.2	158.8	158.9	155.0	153.1	151.1	152.1	169.6	172.4	-9999.0
132	Beaufort Sea	195.6	189.0	187.4	192.8	170.6	172.8	185.8	181.3	176.5	182.0	174.6	171.6	172.9	172.0	161.6	157.4	166.5	188.6	194.8	187.0	191.5	193.7	196.9	200.0	202.8	195.1	189.2	191.9	194.9	206.3	-9999.0
134	Arctic Archipelago	131.9	157.3	171.5	163.9	146.1	127.0	123.4	113.3	104.8	100.2	110.8	119.9	128.7	131.4	122.9	121.6	120.2	125.0	128.6	128.0	140.7	151.5	163.2	176.9	187.2	191.8	187.7	183.5	186.6	183.7	-9999.0
136	Foxe Basin	120.2	132.6	141.4	159.5	162.2	142.6	118.9	116.7	110.6	115.0	116.8	113.8	119.1	125.7	137.9	134.9	125.8	143.7	133.3	143.6	155.0	173.4	177.9	168.4	178.6	181.8	192.9	203.9	215.0	198.8	-9999.0
138	Baffin Bay	121.9	122.6	121.0	127.1	127.4	122.3	104.7	100.7	93.3	99.3	118.3	129.1	126.5	117.2	103.4	98.8	114.9	114.4	143.7	149.8	134.2	120.8	137.9	138.5	127.9	123.7	135.7	139.9	137.7	159.8	-9999.0
139	South Greenland	162.4	162.5	150.1	147.3	154.1	157.2	136.5	126.3	125.4	127.0	137.1	138.6	140.7	134.2	127.9	138.6	147.8	145.3	156.8	177.7	183.9	175.7	173.8	170.9	169.1	168.5	160.4	160.9	155.9	162.1	-9999.0
140	Greenland Sea	130.1	135.8	123.5	119.4	116.3	124.6	126.7	125.3	112.0	117.1	118.2	119.9	121.4	133.2	130.3	115.9	109.2	122.3	131.7	163.9	162.2	134.4	133.7	142.6	129.8	124.3	118.2	117.9	116.0	127.2	-9999.0
142	Norwegian Sea	210.8	212.5	212.4	211.8	213.3	210.6	209.9	210.7	217.1	222.8	221.1	221.4	218.9	218.5	223.1	230.1	238.2	244.5	248.1	244.3	229.5	221.3	223.0	201.5	209.3	220.4	235.4	243.1	245.7	241.8	-9999.0
144	Barents Sea	190.1	198.8	203.2	200.8	197.0	195.0	196.0	191.7	176.6	174.8	184.7	195.2	209.6	217.7	216.0	217.6	216.6	215.8	211.0	205.9	203.4	212.5	215.5	212.4	210.0	202.5	192.3	190.9	209.6	223.8	-9999.0
146	Kara Sea	150.9	144.4	145.6	153.6	170.4	185.6	186.1	175.9	173.3	177.1	173.8	169.7	171.2	176.4	178.6	181.0	180.3	190.8	199.5	199.3	198.5	201.6	207.3	214.8	223.8	226.0	226.0	216.7	206.7	199.9	-9999.0
148	Laptev Sea	164.5	160.0	149.4	144.3	143.9	146.6	153.2	164.1	164.9	161.2	168.2	171.7	163.6	155.0	155.6	163.0	169.7	163.3	162.5	167.6	172.4	172.3	172.5	169.5	178.2	189.6	200.2	205.3	207.9	210.7	-9999.0
150	East Siberian Sea	152.6	146.0	140.8	138.3	143.6	149.1	154.7	159.8	165.3	171.9	181.4	184.0	186.4	192.4	183.0	158.7	143.0	144.8	147.3	144.6	147.5	155.2	162.3	167.5	160.8	162.4	173.8	184.5	170.3	170.1	-9999.0
152	Gulf of Alaska	194.3	195.5	200.3	183.5	201.5	209.3	215.1	216.7	216.2	211.4	203.5	198.1	198.4	188.6	180.1	191.0	213.8	212.0	194.9	200.4	200.8	208.4	213.7	212.4	196.1	192.9	194.9	194.3	183.6	186.6	-9999.0
154	Southeast Bering Sea	175.6	158.8	150.7	192.9	217.0	205.2	211.8	223.5	221.8	212.9	203.1	198.3	181.9	160.2	184.4	217.5	222.0	208.4	206.1	217.1	205.5	227.9	214.5	205.2	186.0	180.6	170.5	177.1	190.2	199.9	-9999.0