1981 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	208.2	208.5	208.8	200.9	201.9	204.4	206.7	206.3	207.2	209.5	207.8	203.8	206.9	210.8	216.6	219.3	222.6	224.0	224.3	224.6	230.1	231.9	234.7	236.1	233.6	233.5	230.8	229.7	226.9	229.0	-9999.0
34	Hudson Bay	232.3	227.1	224.5	215.2	222.0	240.0	238.0	231.4	224.5	225.9	212.9	215.9	218.4	205.3	209.2	233.7	235.8	218.3	204.9	214.6	247.8	254.6	251.0	256.9	249.2	258.2	255.9	256.4	245.8	249.0	-9999.0
36	Hudson Strait	176.8	234.7	194.2	174.9	167.4	213.2	222.9	192.4	184.4	228.9	226.4	201.2	201.3	255.2	193.3	165.4	184.1	166.6	210.5	219.8	227.5	276.9	256.7	236.3	254.0	256.6	251.3	235.9	241.6	238.5	-9999.0
98	Bering Strait	203.7	215.4	203.6	193.0	191.1	189.2	193.7	207.2	211.7	199.9	200.6	189.4	183.7	178.3	177.4	172.7	179.6	189.0	211.1	210.9	215.2	217.2	216.9	221.4	219.7	235.8	239.4	248.7	249.1	248.2	-9999.0
128	Arctic subocean	132.5	140.2	140.0	138.0	135.1	138.1	139.5	158.9	183.1	154.0	157.7	161.6	177.7	156.3	133.9	143.3	143.9	165.1	189.0	177.5	182.9	171.5	197.5	173.5	163.6	160.1	163.8	169.4	169.8	169.0	-9999.0
130	Chukchi Sea	214.7	212.8	221.3	201.4	182.5	179.1	192.4	209.5	195.6	236.5	248.2	221.4	183.0	174.2	176.2	178.9	175.9	178.6	190.2	203.4	198.1	211.8	193.0	186.8	202.9	206.5	233.7	257.2	251.8	270.3	-9999.0
132	Beaufort Sea	220.1	226.2	233.0	211.9	230.6	230.2	219.4	213.8	219.1	211.8	199.4	188.2	185.7	197.2	213.3	218.5	218.8	201.0	222.7	255.0	250.4	242.9	251.4	262.7	252.8	251.0	236.2	250.7	251.1	250.3	-9999.0
134	Arctic Archipelago	163.0	157.2	160.7	161.9	160.0	163.3	167.1	180.1	180.4	184.6	179.3	167.4	168.9	179.6	174.3	177.3	175.4	191.1	187.4	178.9	176.1	186.9	200.0	203.7	208.6	216.2	210.2	199.8	205.7	210.4	-9999.0
136	Foxe Basin	164.1	171.9	171.2	176.9	158.6	180.3	186.7	164.4	159.6	175.4	196.9	205.5	193.2	180.2	193.0	188.8	190.7	184.5	169.2	189.9	230.9	227.6	256.9	258.6	243.8	240.6	234.4	221.3	216.8	212.7	-9999.0
138	Baffin Bay	131.8	136.4	128.4	119.2	133.8	130.1	117.0	114.4	115.5	103.0	116.5	121.8	127.9	122.1	170.9	164.6	179.1	198.1	163.9	143.5	169.2	200.5	191.0	189.4	158.2	140.9	137.6	138.4	158.7	181.0	-9999.0
139	South Greenland	149.0	151.6	181.7	201.0	184.9	162.4	154.0	135.5	130.6	127.0	127.6	140.0	157.4	183.4	212.3	201.2	201.4	200.0	168.7	193.5	203.6	193.2	188.5	182.6	186.1	193.5	206.9	207.3	192.8	178.8	-9999.0
140	Greenland Sea	143.3	130.4	143.7	127.5	123.9	127.1	147.6	161.7	156.8	147.0	139.6	145.7	148.5	131.9	165.5	174.8	148.4	177.0	163.2	126.3	133.8	139.9	175.9	158.5	157.2	154.6	148.1	132.0	119.9	133.2	-9999.0
142	Norwegian Sea	256.8	299.5	270.0	250.2	263.6	261.9	263.8	261.9	288.1	292.4	258.3	291.5	259.8	266.1	253.3	237.8	265.7	255.5	254.5	249.5	221.4	233.3	228.9	228.3	230.0	234.8	232.2	221.1	244.6	244.8	-9999.0
144	Barents Sea	206.1	236.4	264.8	226.9	213.0	251.3	237.0	207.1	191.7	208.6	244.4	221.1	232.6	231.7	217.6	207.1	212.7	238.1	229.3	245.6	236.0	241.2	238.6	224.7	218.2	221.5	220.1	238.6	272.5	269.1	-9999.0
146	Kara Sea	227.9	221.6	212.4	214.0	221.2	216.5	228.1	238.4	243.6	245.0	237.7	238.4	242.7	246.4	248.6	250.0	250.0	253.5	259.4	253.0	252.4	251.6	256.3	255.5	255.3	247.9	236.8	234.7	232.9	234.9	-9999.0
148	Laptev Sea	211.1	213.1	216.2	202.3	189.0	180.3	183.6	190.6	195.0	202.7	203.5	194.5	208.5	216.0	224.3	230.3	242.3	245.3	240.3	226.0	229.4	228.4	230.0	239.1	237.3	235.7	248.7	225.8	204.0	208.3	-9999.0
150	East Siberian Sea	197.3	175.5	186.2	181.0	188.8	194.3	200.2	169.8	174.3	189.8	208.2	200.2	179.8	204.2	222.0	209.7	209.7	208.1	214.8	208.2	208.5	200.8	207.6	211.0	215.4	219.0	211.5	218.2	232.2	229.8	-9999.0
152	Gulf of Alaska	231.5	236.9	211.9	210.3	199.7	205.7	215.0	213.9	206.5	191.8	188.5	192.1	208.4	200.3	195.9	200.9	214.2	233.3	260.1	251.5	241.9	234.8	234.1	234.7	237.2	228.4	224.4	238.5	232.6	235.5	-9999.0
154	Southeast Bering Sea	257.8	233.7	230.7	215.9	219.3	247.5	229.7	244.4	254.5	229.2	220.5	211.2	196.7	190.6	186.1	193.7	211.2	239.4	238.6	227.8	227.4	228.9	234.0	236.5	247.0	233.3	231.8	276.2	250.5	276.1	-9999.0