1973 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	178.0	176.6	176.4	177.9	176.7	174.7	176.8	180.7	183.4	185.8	185.8	186.7	185.4	186.4	189.6	191.4	191.4	192.0	191.3	189.3	189.4	188.5	187.0	188.0	192.0	195.5	196.4	196.1	199.8	203.4	-9999.0
34	Hudson Bay	206.3	203.4	197.7	197.9	193.0	181.5	169.5	167.5	171.7	186.7	191.1	195.1	202.6	205.8	203.9	201.1	206.7	210.3	217.0	225.1	230.0	227.0	212.5	205.1	203.0	204.6	207.4	210.4	210.5	207.7	-9999.0
36	Hudson Strait	172.2	170.1	169.9	182.3	185.9	201.4	204.6	193.4	185.5	177.5	174.9	188.0	163.8	174.4	175.3	178.9	177.1	189.6	184.2	176.4	175.0	180.3	207.7	217.6	229.1	230.5	213.8	219.6	251.4	238.8	-9999.0
98	Bering Strait	172.9	173.7	182.7	181.8	185.6	189.1	195.7	198.6	202.5	193.9	185.9	187.5	191.4	193.2	193.2	186.8	182.4	182.8	184.3	190.1	197.8	193.2	185.4	184.0	184.0	189.1	188.6	182.5	187.6	199.5	-9999.0
128	Arctic subocean	115.3	115.5	113.3	114.2	117.6	117.8	112.5	119.9	123.1	128.1	131.9	137.9	139.0	142.0	147.3	140.6	134.5	128.4	128.9	125.0	118.3	125.1	120.1	126.5	130.6	139.0	139.2	136.0	145.8	158.4	-9999.0
130	Chukchi Sea	168.6	163.7	156.2	168.4	185.7	193.7	201.8	194.7	187.9	185.5	175.7	180.0	188.1	187.2	175.2	169.7	158.8	154.2	159.2	170.1	179.5	176.0	164.3	157.0	155.9	156.5	156.4	161.6	164.9	169.9	-9999.0
132	Beaufort Sea	196.0	193.6	201.8	201.0	184.2	174.9	182.4	197.2	212.9	217.3	211.0	198.9	189.1	185.3	190.5	191.2	189.5	190.9	197.4	201.4	205.7	208.0	197.7	192.6	195.8	208.3	218.3	212.2	207.1	215.5	-9999.0
134	Arctic Archipelago	135.6	143.7	149.1	151.7	142.3	139.4	145.1	147.5	154.5	151.7	155.0	159.7	149.8	152.3	152.3	149.8	150.5	148.9	149.5	157.9	169.5	168.4	167.6	162.1	160.4	163.3	166.2	169.0	182.8	189.2	-9999.0
136	Foxe Basin	119.1	123.3	130.6	134.3	132.5	126.3	133.7	146.0	154.6	164.5	174.1	164.4	154.3	154.2	150.8	148.2	144.6	148.8	160.4	149.2	146.1	163.9	163.5	173.5	179.8	190.4	200.8	206.2	200.3	213.0	-9999.0
138	Baffin Bay	98.1	94.7	89.6	89.8	91.7	91.3	107.6	111.2	115.4	137.2	145.3	145.1	139.4	150.4	158.1	149.8	135.9	133.3	124.4	110.4	117.8	115.5	112.1	123.9	131.2	124.3	122.7	141.3	161.2	156.6	-9999.0
139	South Greenland	116.8	108.0	113.1	119.6	122.4	138.2	173.9	201.9	200.1	193.1	199.3	197.1	176.0	164.9	154.6	144.6	151.9	171.8	161.2	153.6	151.6	162.9	179.4	180.7	187.0	178.8	166.8	170.0	175.2	180.8	-9999.0
140	Greenland Sea	86.0	83.1	85.9	99.6	105.2	100.2	113.1	121.4	119.5	133.0	142.5	139.6	132.4	134.7	127.2	125.6	119.2	131.1	128.5	116.7	114.8	114.3	115.4	116.4	127.0	126.2	124.7	128.7	142.4	145.8	-9999.0
142	Norwegian Sea	220.5	216.3	208.6	211.8	216.7	217.1	214.6	211.6	208.7	203.7	205.5	206.8	213.3	223.5	214.0	224.3	224.3	223.4	222.6	221.8	221.8	227.5	226.1	221.8	221.4	204.6	202.6	205.4	213.9	218.7	-9999.0
144	Barents Sea	215.0	214.9	220.1	222.0	216.9	215.5	225.0	236.3	228.9	222.3	225.7	243.3	239.4	228.6	229.2	217.8	222.6	227.7	231.2	222.7	207.7	193.5	190.3	188.5	195.6	215.8	229.6	228.5	231.3	225.6	-9999.0
146	Kara Sea	202.4	202.3	202.5	205.5	206.9	204.2	199.4	199.3	201.6	205.0	202.4	201.4	202.7	204.7	217.2	229.4	227.0	219.3	212.6	202.5	197.3	191.6	190.9	197.9	206.9	207.2	200.6	197.4	206.4	216.2	-9999.0
148	Laptev Sea	168.8	161.2	153.1	149.7	150.1	150.5	154.1	157.7	160.6	156.8	155.2	155.7	157.9	162.4	165.4	166.1	166.9	166.5	165.6	167.8	168.9	173.7	180.1	183.4	185.3	194.4	204.4	205.0	195.0	191.8	-9999.0
150	East Siberian Sea	134.7	144.0	143.4	145.1	148.7	148.4	148.6	146.0	144.3	147.8	152.3	154.7	155.3	155.9	153.8	165.5	173.3	184.7	191.3	189.9	188.6	197.7	201.7	197.3	197.6	195.9	197.8	196.1	193.0	192.0	-9999.0
152	Gulf of Alaska	197.6	203.4	207.4	199.3	200.0	202.5	212.7	224.3	217.6	210.3	203.8	207.8	210.9	212.6	211.6	206.0	205.3	203.5	200.8	203.1	212.1	202.4	196.1	204.4	207.9	213.6	206.6	201.0	215.3	232.5	-9999.0
154	Southeast Bering Sea	192.9	192.8	185.5	188.3	210.7	215.8	211.7	214.3	213.6	213.0	213.7	224.9	222.3	219.6	213.5	213.4	210.8	205.3	197.1	198.9	201.6	200.0	200.2	199.3	197.0	184.9	181.0	184.6	217.8	217.8	-9999.0