1956 09 - 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	281.8	279.8	278.3	277.0	273.7	274.3	272.2	271.4	275.2	275.1	273.6	271.8	269.9	267.2	266.9	264.9	260.7	260.5	262.8	263.2	259.5	255.5	251.9	247.0	246.0	248.5	246.4	242.6	242.5	248.0	-9999.0
34	Hudson Bay	318.5	299.4	288.1	278.9	272.3	277.1	271.8	272.8	290.2	289.6	290.3	283.8	266.8	252.5	275.3	278.1	271.2	271.1	261.0	278.2	294.4	289.3	277.0	275.6	283.1	293.0	297.4	289.3	264.2	263.9	-9999.0
36	Hudson Strait	306.5	344.7	278.5	287.6	258.2	254.7	287.5	269.9	256.2	260.2	242.4	279.1	249.3	249.7	250.5	237.1	258.2	289.7	273.4	259.3	290.6	263.0	249.1	254.4	230.7	248.1	272.4	290.7	312.7	256.4	-9999.0
98	Bering Strait	273.0	270.4	271.5	270.6	271.5	271.2	274.3	281.4	298.3	288.0	291.6	297.5	292.8	285.0	265.4	277.5	270.0	253.5	267.4	256.2	236.7	245.4	239.2	228.4	232.6	223.3	219.4	225.1	241.3	259.7	-9999.0
128	Arctic subocean	246.8	231.6	241.9	202.8	204.2	196.9	197.1	197.4	198.1	185.1	188.2	192.0	182.1	176.1	182.7	192.1	212.7	206.4	194.2	174.1	161.4	161.4	151.9	151.5	157.3	164.0	160.5	153.3	164.4	161.5	-9999.0
130	Chukchi Sea	254.7	262.9	271.5	278.5	284.7	290.8	302.0	309.0	319.8	286.1	268.9	279.4	277.3	270.1	242.1	266.8	244.5	238.2	236.2	232.6	211.8	234.4	242.3	257.0	235.7	224.0	235.4	246.7	232.6	219.4	-9999.0
132	Beaufort Sea	273.8	254.9	248.9	247.9	250.2	260.2	268.5	285.5	282.7	296.0	286.5	277.7	290.9	303.9	291.0	268.2	279.0	290.2	307.4	299.2	285.8	268.1	262.0	242.8	237.8	238.3	223.2	219.3	229.8	242.3	-9999.0
134	Arctic Archipelago	215.5	231.4	241.0	245.3	235.2	231.9	240.4	230.5	249.2	248.9	219.6	206.9	205.5	220.0	213.4	215.1	215.1	221.6	244.4	264.3	273.8	273.2	266.0	242.1	229.7	208.1	195.5	188.4	177.8	182.8	-9999.0
136	Foxe Basin	289.0	281.5	288.6	284.6	273.1	253.2	249.7	247.4	247.7	241.6	237.1	252.8	254.8	236.7	239.9	238.5	240.5	245.9	234.2	241.2	253.8	270.0	278.1	267.0	255.5	266.6	264.8	238.8	263.3	258.2	-9999.0
138	Baffin Bay	183.9	197.1	210.9	210.6	216.4	207.0	207.0	204.0	197.6	192.8	183.9	178.2	174.4	176.0	181.9	199.6	201.9	177.0	159.7	145.1	147.6	144.4	127.9	141.8	164.1	169.7	154.2	142.7	152.1	168.6	-9999.0
139	South Greenland	232.1	242.2	243.3	248.5	239.5	234.2	227.0	239.2	228.0	220.3	209.6	195.4	196.0	194.3	233.9	243.4	191.6	174.8	176.6	188.6	172.7	175.2	194.5	212.8	194.7	199.7	197.6	188.0	186.2	215.9	-9999.0
140	Greenland Sea	173.7	177.6	193.2	197.8	184.7	181.8	178.9	179.7	177.3	188.1	204.7	190.7	203.2	213.9	203.3	185.9	179.1	167.8	171.4	159.4	152.3	154.3	154.9	150.1	136.4	137.0	138.9	127.5	111.8	117.9	-9999.0
142	Norwegian Sea	296.7	310.5	287.0	295.3	283.1	294.9	302.5	302.6	317.6	320.9	307.0	299.0	299.3	307.7	294.5	286.8	277.7	286.2	309.7	296.8	281.9	286.9	309.3	328.0	305.7	284.8	298.5	312.6	310.9	278.0	-9999.0
144	Barents Sea	306.4	293.0	281.8	281.4	279.6	276.2	280.6	286.2	283.9	276.4	299.3	289.1	286.4	286.6	297.0	285.3	269.9	266.1	269.6	280.8	285.3	271.2	263.8	264.2	278.8	263.6	247.1	264.5	302.9	306.9	-9999.0
146	Kara Sea	304.6	302.8	304.1	303.0	301.3	300.0	293.8	286.8	292.2	289.4	286.1	284.5	284.5	281.4	275.9	272.0	275.5	279.9	282.0	281.7	273.1	265.9	265.6	259.5	261.3	269.1	271.3	262.0	255.4	261.2	-9999.0
148	Laptev Sea	287.5	285.7	285.7	290.4	288.8	288.7	284.6	282.4	276.7	286.8	283.6	286.7	294.2	282.6	272.1	273.4	273.2	272.0	269.5	259.7	254.0	268.8	264.7	250.8	242.3	248.6	250.7	251.6	243.0	255.9	-9999.0
150	East Siberian Sea	261.1	283.3	287.1	270.2	267.9	285.3	264.2	245.9	251.4	250.7	262.6	276.5	262.4	281.2	288.7	280.7	250.5	240.4	263.7	278.0	269.1	238.0	238.2	250.6	250.4	246.1	231.2	225.7	255.3	238.9	-9999.0
152	Gulf of Alaska	266.3	269.4	277.8	287.7	290.0	274.2	270.5	277.6	291.8	293.1	331.3	340.1	313.9	291.4	268.6	296.7	288.6	316.5	291.6	258.3	248.2	239.1	228.4	223.5	219.0	220.1	230.7	229.2	257.8	281.2	-9999.0
154	Southeast Bering Sea	281.4	294.8	318.9	314.1	301.4	285.7	313.6	328.8	324.9	297.0	336.4	331.6	331.7	298.2	286.9	273.1	268.2	265.1	265.4	228.5	216.9	218.5	218.0	230.7	250.7	249.3	233.0	255.3	313.7	289.9	-9999.0