1974 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	202.2	198.6	193.6	194.2	193.0	196.8	197.6	207.8	213.9	216.4	215.8	212.8	212.7	214.4	215.7	215.9	215.4	218.7	219.7	221.9	226.3	223.6	226.0	229.1	226.0	221.9	223.8	223.6	224.1	224.1	-9999.0
34	Hudson Bay	221.4	222.3	212.0	209.1	205.5	199.4	188.1	207.3	219.6	225.1	231.0	237.6	243.3	236.7	238.2	239.4	228.6	218.7	250.0	255.4	260.8	246.6	236.4	253.9	261.9	260.4	261.8	244.3	238.4	232.1	-9999.0
36	Hudson Strait	195.5	188.2	193.6	180.6	201.0	243.5	189.8	198.3	197.9	193.7	200.1	195.9	207.6	185.1	211.6	193.5	161.3	155.0	169.0	189.2	228.1	214.5	196.1	216.6	240.9	230.8	211.7	145.3	182.0	206.3	-9999.0
98	Bering Strait	164.4	159.8	169.5	180.3	189.5	203.7	210.3	210.1	203.4	207.2	202.2	199.2	207.0	231.4	216.6	220.3	223.3	227.1	215.6	210.3	205.1	202.3	231.3	234.0	211.6	210.7	227.8	243.5	227.1	216.3	-9999.0
128	Arctic subocean	138.9	150.4	128.4	136.4	151.6	162.8	140.6	140.7	141.3	146.4	154.1	154.5	147.3	153.8	145.6	125.7	135.5	156.4	153.5	134.9	133.9	138.7	138.2	129.6	130.7	143.5	143.9	142.3	152.1	167.6	-9999.0
130	Chukchi Sea	158.3	155.9	154.9	169.5	162.1	169.1	189.8	188.9	170.7	170.8	160.2	161.2	172.9	194.8	191.2	188.1	197.4	203.3	183.5	174.6	160.5	169.2	178.8	203.3	202.8	203.9	236.7	216.8	214.7	201.1	-9999.0
132	Beaufort Sea	201.9	189.9	175.4	174.2	177.8	199.2	216.5	218.4	222.1	225.1	233.8	237.2	222.8	238.2	246.4	227.2	223.2	240.5	228.5	229.9	232.0	234.4	245.2	236.6	234.2	225.8	222.8	231.7	215.6	202.5	-9999.0
134	Arctic Archipelago	149.0	149.2	151.7	156.5	156.0	149.0	151.3	160.7	167.4	184.3	178.3	162.9	182.5	183.4	177.2	158.7	161.8	166.5	155.8	169.6	188.9	183.6	179.9	182.0	160.0	144.8	159.1	161.1	177.0	183.8	-9999.0
136	Foxe Basin	183.9	201.4	175.0	153.4	170.9	191.4	218.4	232.3	242.2	228.1	210.3	198.5	165.8	185.9	167.9	160.1	165.4	157.9	193.4	199.9	206.0	190.3	180.3	185.5	227.8	165.4	166.2	175.1	181.1	167.1	-9999.0
138	Baffin Bay	132.4	131.3	121.0	119.1	110.1	107.6	110.1	136.4	178.2	168.3	165.4	167.9	140.1	130.9	123.1	141.1	169.9	177.6	163.3	149.0	146.0	152.7	155.5	154.0	155.6	169.4	165.3	179.7	184.4	189.9	-9999.0
139	South Greenland	153.6	161.4	150.6	153.0	142.1	132.3	157.5	193.3	186.1	175.7	172.1	170.8	188.2	172.5	178.4	191.7	179.9	193.8	207.7	200.0	186.7	184.3	194.8	219.2	193.1	187.4	182.9	195.0	204.9	198.0	-9999.0
140	Greenland Sea	120.8	118.2	134.8	137.5	131.9	136.7	120.5	112.6	133.4	147.6	133.4	139.5	153.4	133.1	122.4	144.0	144.2	148.8	167.9	164.4	149.8	139.5	148.9	170.5	163.2	147.6	147.4	138.9	169.8	172.6	-9999.0
142	Norwegian Sea	254.9	253.7	266.2	281.3	286.4	278.5	284.4	253.2	240.9	235.8	214.0	227.9	254.5	273.4	252.8	246.9	274.5	249.4	285.4	273.9	269.0	274.3	257.7	251.0	284.9	278.1	267.3	260.1	241.7	249.2	-9999.0
144	Barents Sea	264.6	248.1	236.1	238.5	251.3	244.7	253.2	262.8	233.4	220.2	213.9	217.7	207.6	221.7	223.4	237.2	239.9	235.0	231.6	238.4	246.6	244.1	233.5	230.9	241.2	255.3	258.7	238.9	253.0	237.7	-9999.0
146	Kara Sea	223.5	217.1	215.9	211.0	203.7	208.1	213.3	232.1	250.2	254.8	255.1	242.9	235.5	236.5	239.4	238.6	239.4	249.3	247.6	251.5	248.8	250.4	249.2	237.0	232.9	235.2	243.9	248.4	240.7	249.0	-9999.0
148	Laptev Sea	211.5	211.5	198.5	199.7	196.8	206.1	198.8	192.2	191.6	202.0	198.0	197.1	202.0	202.6	205.3	207.9	214.2	210.4	200.5	200.5	222.4	216.9	219.4	242.4	243.8	220.8	206.9	210.8	225.1	226.7	-9999.0
150	East Siberian Sea	175.7	173.0	177.3	201.0	201.9	194.2	185.2	185.1	175.6	164.4	166.4	164.7	162.6	168.1	178.5	182.5	180.8	181.5	180.0	182.3	196.0	200.3	210.9	202.1	198.1	204.3	204.2	210.2	216.8	222.3	-9999.0
152	Gulf of Alaska	204.1	190.4	209.8	214.5	241.6	240.1	232.8	236.6	240.2	260.4	247.3	240.1	273.9	261.8	244.2	263.4	235.6	231.3	234.8	237.5	240.1	226.2	278.4	277.0	225.8	228.1	258.2	256.9	235.4	244.9	-9999.0
154	Southeast Bering Sea	202.7	203.7	213.0	214.0	226.5	225.6	221.9	231.8	266.4	219.7	227.7	228.9	237.5	242.0	242.9	244.4	244.8	253.7	239.6	250.4	226.4	249.0	282.8	257.6	221.8	230.8	238.4	244.5	236.3	225.2	-9999.0