Tuatara: Volume 20, Issue 3, November 1973

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N.Z. Meteorological Service — extra atmospheric radiation averages for 5 day periods, months (February 28 days) and year units Langleys per day and Langleys. Solar constant 1.95 ly per min. Latitude 40 deg. 0 min.

Initial Date	Pentade		Average Langleys Per Day
Jan	1	1–6	1057	1048	1037	1024	1007	988	Jan	1025
Jan	31	7–12	967	943	918	891	862	832	Feb	902
Mar	2	13–18	800	768	736	702	669	636	Mar	722
Apr	1	19–24	603	571	540	510	482	455	Apr	527
May	1	25–30	429	406	385	366	349	334	May	376
May	31	31–36	323	313	307	303	301	303	Jun	307
Jun	30	37–42	306	313	322	334	348	364	Jul	335
Jul	30	43–48	383	403	426	451	477	505	Aug	454
Aug	29	49–54	534	565	596	628	660	693	Sep	632
Sep	28	55–60	725	757	789	820	850	879	Oct	825
Oct	28	61–66	907	933	957	979	999	1016	Nov	982
Nov	27	67–72	1031	1043	1053	1059	1063	1064	Dec	1057
Dec	27	73	1062
									Year	679

(See de Lisle, J.F., 1966. Mean daily insolation in New Zealand, N.Z.J.Sci. 9: 992–1005, for relationship between extra-atmospheric and sea-level radiation).

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Tuatara: Volume 20, Issue 3, November 1973

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