1956 09 - 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	255.6	253.1	252.3	251.4	249.8	249.6	246.8	246.6	249.1	248.6	247.2	244.6	241.5	238.2	237.6	234.6	231.1	231.4	231.7	231.4	227.9	224.0	221.1	220.2	219.9	220.4	218.1	213.4	213.0	215.2	-9999.0
34	Hudson Bay	294.9	275.1	260.2	252.3	243.9	247.7	245.8	249.8	261.7	264.9	266.1	257.9	243.9	232.4	245.2	251.4	246.3	247.0	240.9	248.6	257.6	255.2	252.5	254.2	255.9	265.3	270.6	256.5	239.9	236.2	-9999.0
36	Hudson Strait	284.1	315.0	262.3	254.6	234.9	234.0	240.8	230.1	226.0	224.7	218.6	232.3	224.1	224.6	215.8	217.9	227.8	240.3	227.3	224.9	238.2	227.3	219.0	221.9	218.4	228.6	239.4	251.6	272.8	234.5	-9999.0
98	Bering Strait	248.3	246.2	251.2	251.9	251.9	250.3	250.3	252.5	261.4	258.1	262.0	264.6	258.6	250.4	239.1	240.7	238.3	227.7	232.0	221.4	212.4	215.0	209.6	205.7	208.3	202.1	197.6	198.0	204.1	215.4	-9999.0
128	Arctic subocean	196.5	195.2	202.1	190.1	183.2	177.3	177.9	177.3	174.6	170.5	174.6	178.1	170.9	169.0	172.8	172.8	172.7	171.9	170.0	163.3	154.8	153.8	143.3	141.4	144.9	149.1	145.8	139.1	141.7	143.1	-9999.0
130	Chukchi Sea	240.6	242.3	253.1	260.4	260.5	255.7	260.9	264.2	273.0	252.4	246.5	248.6	243.5	237.4	224.1	229.2	218.9	211.2	208.2	201.4	197.4	211.1	212.9	219.2	217.7	208.7	208.3	210.8	204.0	198.2	-9999.0
132	Beaufort Sea	243.1	225.8	226.1	228.9	232.2	241.7	248.2	260.2	264.0	273.0	264.9	254.8	258.8	265.3	261.5	246.8	252.8	260.0	271.3	270.9	258.4	243.4	230.6	212.7	208.7	207.9	195.7	196.1	202.9	213.2	-9999.0
134	Arctic Archipelago	201.8	211.0	215.4	214.2	213.4	212.1	211.6	204.6	212.7	215.2	199.4	194.1	194.7	198.7	196.5	194.2	194.6	201.5	212.3	225.4	235.2	236.6	227.1	214.2	200.2	186.3	179.6	174.8	168.7	171.9	-9999.0
136	Foxe Basin	245.0	247.0	237.4	228.2	227.5	223.8	221.2	216.0	210.4	207.6	209.6	216.0	218.8	212.2	208.0	204.8	206.8	213.7	210.9	212.0	216.9	220.0	223.7	227.1	225.2	220.0	219.4	209.7	210.5	206.2	-9999.0
138	Baffin Bay	164.4	173.0	184.5	189.4	187.0	181.8	180.9	177.8	173.7	170.9	167.3	165.7	163.4	162.1	165.9	168.5	163.9	156.1	147.3	137.9	137.0	134.2	122.0	130.7	144.9	152.0	145.0	134.5	137.8	146.6	-9999.0
139	South Greenland	211.2	213.0	215.4	208.1	202.0	199.0	196.8	199.4	194.0	184.3	176.5	170.3	169.7	168.5	194.3	201.1	171.2	160.6	162.6	173.0	159.6	158.1	167.5	183.0	177.8	180.3	176.4	168.5	165.6	175.3	-9999.0
140	Greenland Sea	156.5	157.6	173.9	177.1	170.4	166.5	165.7	168.0	165.4	162.9	166.3	162.5	166.9	171.9	167.0	166.4	154.0	141.8	142.0	138.4	134.8	133.2	132.9	129.0	124.5	127.5	129.2	121.9	106.4	110.6	-9999.0
142	Norwegian Sea	260.1	270.5	262.1	262.3	249.3	259.7	264.4	266.8	274.5	276.8	272.6	261.0	259.0	264.1	254.2	248.7	248.0	256.0	260.4	257.3	240.7	250.9	267.9	280.5	264.5	252.4	258.5	267.3	259.3	242.6	-9999.0
144	Barents Sea	268.2	262.0	251.9	244.4	245.2	242.6	245.2	250.2	252.8	248.3	259.1	263.9	261.0	258.4	260.3	253.8	243.7	239.5	239.1	242.4	243.7	232.2	227.4	230.0	236.4	228.1	219.9	229.4	259.2	265.4	-9999.0
146	Kara Sea	273.8	272.6	276.4	278.5	278.6	274.7	267.5	264.0	265.9	261.0	257.4	255.3	253.1	251.4	247.6	240.8	241.2	248.0	248.1	246.5	237.8	232.0	230.8	232.2	232.8	232.2	230.1	224.0	222.4	224.1	-9999.0
148	Laptev Sea	264.2	265.4	266.2	270.3	272.5	272.4	267.1	265.3	260.3	266.0	262.9	260.8	260.8	250.1	243.2	240.3	239.3	234.9	230.6	224.2	223.6	229.2	227.8	221.2	219.6	224.6	225.6	221.2	216.4	221.3	-9999.0
150	East Siberian Sea	237.7	250.9	251.7	242.9	240.1	247.4	235.2	223.8	227.7	229.3	238.9	242.7	238.2	251.9	251.5	243.1	226.0	215.9	230.1	239.8	230.8	213.4	213.1	221.4	223.5	219.0	209.2	204.4	211.5	204.5	-9999.0
152	Gulf of Alaska	251.5	252.0	253.9	257.5	260.7	257.7	256.7	258.0	267.0	271.0	287.6	296.3	281.9	261.5	246.1	256.4	255.1	266.6	254.2	230.6	218.2	214.2	211.5	210.3	208.1	207.4	212.0	209.7	222.8	238.2	-9999.0
154	Southeast Bering Sea	270.0	273.8	278.8	280.4	275.1	273.0	280.8	285.1	287.9	272.4	293.6	288.1	290.0	263.8	256.7	250.8	249.1	245.2	239.3	209.8	202.6	207.2	210.4	216.6	228.3	229.9	224.3	229.4	257.7	244.0	-9999.0