1973 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	258.7	258.5	257.0	259.0	257.9	257.7	254.8	252.5	253.5	253.2	252.5	251.9	248.6	242.7	241.4	239.2	236.3	235.7	232.5	229.3	226.5	224.0	222.2	229.3	228.3	221.7	219.3	216.1	213.9	213.2	-9999.0
34	Hudson Bay	310.1	297.5	290.2	300.3	290.6	273.8	265.8	273.6	286.3	282.4	265.5	256.1	246.2	239.0	234.8	237.5	234.9	234.4	231.0	233.4	242.7	248.0	249.0	265.1	281.0	272.2	265.9	264.6	257.4	260.4	-9999.0
36	Hudson Strait	278.1	304.9	254.9	247.3	252.1	293.0	276.0	254.6	244.0	242.5	247.9	247.9	247.9	245.8	235.5	222.5	225.5	231.2	218.3	224.3	218.7	217.3	213.4	234.6	241.4	262.4	268.9	235.8	229.2	226.8	-9999.0
98	Bering Strait	230.5	237.9	239.4	240.3	242.8	245.4	242.4	239.3	235.7	236.0	236.7	240.4	248.2	248.1	253.0	246.6	242.5	239.9	237.3	232.5	231.4	226.0	218.9	214.4	213.0	210.8	216.5	213.8	218.6	222.2	-9999.0
128	Arctic subocean	217.0	215.0	205.3	198.3	197.5	197.7	190.6	180.6	172.0	171.9	173.7	177.8	173.9	164.9	148.0	151.3	160.8	171.5	167.8	166.3	165.7	161.2	158.9	167.2	156.1	155.1	145.9	153.4	156.3	149.8	-9999.0
130	Chukchi Sea	234.4	230.6	240.9	240.2	235.5	234.7	237.7	232.6	223.3	230.3	241.5	253.7	260.0	251.1	264.4	262.9	255.1	246.4	240.5	229.2	225.1	218.4	216.0	221.0	208.0	196.4	201.0	215.1	239.3	243.2	-9999.0
132	Beaufort Sea	250.1	262.5	262.0	254.4	255.6	274.8	279.4	263.7	255.6	247.8	248.9	241.4	230.5	237.3	246.1	251.8	248.0	251.8	253.6	253.1	251.2	252.3	250.5	248.2	239.0	223.9	235.5	238.7	235.5	226.7	-9999.0
134	Arctic Archipelago	239.4	243.1	241.2	237.7	232.0	224.5	239.2	256.0	245.2	223.7	205.2	197.7	205.1	220.4	230.3	197.9	189.8	202.4	211.8	208.8	206.9	220.7	225.7	224.0	221.8	214.7	204.1	201.0	197.1	191.8	-9999.0
136	Foxe Basin	242.0	239.8	228.6	229.3	243.6	244.7	233.8	223.7	233.2	243.5	243.9	240.1	227.8	219.3	211.4	218.2	218.0	214.1	212.2	210.2	210.2	204.7	211.1	215.5	216.4	241.1	238.4	230.5	226.8	204.8	-9999.0
138	Baffin Bay	196.8	193.2	184.7	183.3	190.7	186.0	176.4	170.7	181.8	193.8	189.2	188.5	177.9	154.1	151.9	162.0	174.5	183.5	184.7	174.9	165.9	157.9	155.5	159.4	154.2	150.5	155.7	165.9	164.6	168.4	-9999.0
139	South Greenland	196.6	192.7	190.8	193.6	188.1	182.3	174.3	178.3	197.9	210.8	221.0	221.7	214.6	202.7	205.1	203.5	204.1	200.2	193.0	179.5	170.6	172.2	174.8	176.3	178.2	170.6	162.0	159.9	180.7	191.0	-9999.0
140	Greenland Sea	179.2	179.8	171.5	161.7	156.9	163.2	157.1	153.7	148.6	172.5	172.5	176.1	182.8	158.8	149.8	153.8	165.2	177.5	182.1	183.0	168.1	144.4	144.4	153.1	157.0	141.7	138.2	136.3	146.1	151.1	-9999.0
142	Norwegian Sea	272.2	268.4	263.6	262.5	265.2	261.8	261.5	265.0	250.6	238.2	236.6	236.6	252.3	249.3	263.4	251.6	261.2	265.3	260.8	258.7	254.2	231.8	234.3	253.1	251.9	238.4	231.6	237.2	240.9	241.5	-9999.0
144	Barents Sea	258.9	259.6	256.3	257.3	256.2	255.6	250.3	239.7	235.9	237.2	237.6	232.6	233.4	239.1	237.3	235.3	232.5	234.3	233.9	230.4	224.8	214.6	213.9	232.7	239.1	236.2	236.1	235.9	239.7	249.5	-9999.0
146	Kara Sea	277.0	275.1	275.7	277.9	278.6	279.3	277.9	273.2	272.1	273.1	275.5	276.1	276.5	272.7	270.7	269.6	262.9	248.7	239.6	237.1	228.0	222.8	221.6	235.3	231.9	224.8	222.6	215.1	208.7	204.7	-9999.0
148	Laptev Sea	264.6	265.8	270.9	273.7	268.8	267.1	263.2	267.1	272.8	272.5	277.2	282.1	270.7	250.0	247.7	241.6	237.4	252.1	250.1	239.2	240.7	234.7	231.3	227.8	218.6	210.1	203.1	202.6	197.3	196.5	-9999.0
150	East Siberian Sea	210.9	211.0	218.0	229.6	243.3	246.9	244.5	230.9	225.6	225.7	230.4	239.7	241.1	234.4	215.4	216.8	220.3	218.5	221.9	226.9	227.4	232.8	221.3	222.3	222.5	220.5	214.8	200.8	195.9	189.0	-9999.0
152	Gulf of Alaska	248.9	251.6	246.1	251.0	253.8	251.9	244.3	247.0	243.2	246.1	241.4	242.6	250.3	250.4	252.1	248.5	249.7	244.7	242.6	240.3	241.2	233.4	222.9	230.8	225.9	234.7	230.9	223.1	222.0	229.9	-9999.0
154	Southeast Bering Sea	254.9	257.0	264.7	267.3	268.0	266.4	262.3	260.5	256.0	251.9	258.9	268.4	274.0	269.3	277.1	267.1	258.0	250.0	247.1	246.2	242.7	232.6	232.4	240.5	231.3	223.3	216.2	231.7	250.1	267.1	-9999.0