24 Hours of Daylight. Farming in Umea

July 24, 2013

My father in law is a mobile combine harvester engineer and was telling me about a client who grows Malt 10 hours drive North of Stockholm. The planting season is Late May early June, The Snow goes around the second week of May and is back some time in October. But he plants and harvests along with his neighbors several thousand acres most years ( Last Year the Snow beat the Harvest window.) The point being there is 22 hrs of Sunlight June July August September. This made me think about the Solar energy implications in a linked system Nothern and southern hemispheres. Obviously its an interesting example of how our pre disposed notions of what is possible can be challenged?

Date	Sunrise	Sunset	Length	Change	Dawn	Dusk	Length	Change
Today	03:24	22:05	18:41		01:22	23:59	22:37
+1 day	03:27	22:02	18:35	00:06 shorter	01:33	23:50	22:17	00:20 shorter
+1 week	03:46	21:43	17:57	00:44 shorter	02:17	23:09	20:52	01:45 shorter
+2 weeks	04:08	21:20	17:12	01:29 shorter	02:53	22:32	19:39	02:58 shorter
+1 month	04:56	20:25	15:29	03:12 shorter	03:59	21:22	17:23	05:14 shorter
+2 months	06:22	18:40	12:18	06:23 shorter	05:35	19:27	13:52	08:45 shorter
+3 months	07:49	16:56	9:07	09:34 shorter	07:00	17:46	10:46	11:51 shorter
+6 months	08:46	14:56	6:10	12:31 shorter	07:44	15:58	8:14	14:23 shorter

Notes: Daylight saving time, * = Next day. Change preferences.

Umeå, Sweden – Sunrise, sunset, dawn and dusk times, graph

Umeå - sunrise, sunset, dawn and dusk times for the whole year in a graph

Darkness Dawn Sunshine Dusk Notes: How to read this graph? Change preferences.

Umeå, Sweden – Sun path diagram

Umeå - Sun path diagram (solar path diagram, sun chart, solar chart)

Sun path
	Today
	June 21
	December 21
	Annual variation
	Equinox (March and September)
Sunrise/sunset
	Sunrise
	Sunset
Time
	00-02
	03-05
	06-08
	09-11
	12-14
	15-17
	18-20
	21-23

Notes: • = Daylight saving time, * = Next day. How to read this graph? Change preferences.

Umeå, Sweden – Solar energy and surface meteorology

Variable	I	II	III	IV	V	VI	VII	VIII	IX	X	XI	XII
Insolation, kWh/m²/day	0.10	0.71	2.04	4.01	5.17	5.72	5.11	3.77	2.27	0.98	0.23	0.02
Clearness, 0 – 1	0.26	0.43	0.50	0.56	0.52	0.51	0.48	0.46	0.43	0.40	0.32	0.15
Temperature, °C	-8.05	-7.97	-4.49	0.54	7.16	12.51	15.17	13.53	8.79	3.52	-2.15	-6.01
Wind speed, m/s	5.86	5.81	4.99	4.73	4.61	4.27	4.58	4.59	4.92	5.80	5.73	5.87
Precipitation, mm	46	35	34	31	35	38	56	68	64	54	62	50
Wet days, d	18.0	14.8	13.9	11.9	10.9	11.0	12.0	14.0	14.9	15.0	16.9	17.9

These data were obtained from the NASA Langley Research Center Atmospheric Science Data Center; New et al. 2002
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Umeå, Sweden – Basic information

Latitude: +63.83 (63°49’48″N)
Longitude: +20.24 (20°14’24″E)
Time zone: UTC+1 hours
Local time: 09:59:02
Country: Sweden
Continent: Europe
Sub-region: Northern Europe
Distance: ~900 km (from your IP)
Altitude: ~20 m
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Umeå