Citation:

PANGAEA.611088

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Related to:

García-Herrera, Ricardo; Können, Gunther P; Wheeler, Dennis A; Prieto, Maria del Rosario; Jones, Philip D; Koek, Frits B (2005): CLIWOC: A Climatological Database for the World's Oceans 1750–1854 (and 10 more publications about CLIWOC results in the same volume). Climatic Change, 73(1-2), 1-12ff, https://doi.org/10.1007/s10584-005-6952-6

Project(s):

Climatological Database for the Worlds Oceans: 1750-1854 (CLIWOC)

Funding:

Fifth Framework Programme (FP5), grant/award no. EVK2-CT-2000-00090 : Climatological Database for the Worlds Oceans: 1750-1854

Coverage:

Median Latitude: -11.150000 * Median Longitude: -10.760000 * South-bound Latitude: -12.400000 * West-bound Longitude: -12.030000 * North-bound Latitude: -9.870000 * East-bound Longitude: -9.470000

Event(s):

Admiral_Vernon_17500226_BL_L/MAR/B/623C * Latitude Start: -15.890000 * Longitude Start: -5.750000 * Latitude End: 50.299000 * Longitude End: -4.150000 * Campaign: * Method/Device: Underway cruise track measurements (CT) * Comment: Ship: Admiral Vernon, Start of voyage: 1750-03-09, End of voyage: 1750-03-11, Voyage: St Helena - Plymouth, 1st Observer: Edmund Cooke (Author), Company: EIC, Other ship information: 493BM. 1740-1751

Parameter(s):

#	Name	Short Name	Unit	Comment
1	Date/time start	Date/time start
2	LATITUDE	Latitude		Geocode
3	LONGITUDE	Longitude		Geocode
4	Wind direction	dd	deg	Wind direction (from which the wind is blowing) in whole degrees from: 1-360; 361 = calm, 362 = variable. It is not clear from many logbook entries whether the wind direction has been corrected for the magnetic variation (or declination). To avoid any misunderstanding, all winds from reports that included a valid position in the period 1750-1854 were corrected. All other wind directions are given without being corrected.
5	Wind speed	ff	m/s	calculated from the descriptive terms of wind force given in the observations
6	Landmark	Landmark		Name of first landmark
7	Course	Course		Course of the ship during the past 24 hours
8	Distance	Distance	arbitrary units	Distance travelled during the previous 24 hours
9	Declination	Decl	deg	It is generally accepted by the CLIWOC team that the wind directions, reported by the ships officers, were relative to the magnetic North direction. Navigators were well aware of the difference between the true and magnetic north direction, but the compasses (we assumed that the bearing-compasses were mostly used for determining the wind direction) were not always adjusted. Therefore the wind direction has to be corrected. The magnetic declination (or variation, as it is known on board ships) is given for the whole CLIWOC period (1750-1850) for every 5x5 degree square. The number was added to the wind direction to get the true wind direction.
10	Wind direction description	Wind dir descr		All reported wind directions on this day. The wind direction is the direction that points to where the wind comes from.
11	Wind force description	Wind force descr		All reported wind forces on this day
12	Present weather	ww		Weather description
13	State of the sea description	State sea descr
14	Gusts	Gusts		1 If wind gusts are reported
15	Precipitation/Rain	Rain		1 If rain was reported
16	Fog	Fog		1 If fog was reported
17	Snow type	Snow		1 If snow was reported
18	Thunder	Thunder		1 If thunder and or lightning was reported
19	Hail	Hail		1 If hail was reported
20	Sea ice	Sea ice		1 If sea-ice or icebergs were reported
21	Identification	ID		CLIWOC 2.1 line number

License:

Creative Commons Attribution 3.0 Unported (CC-BY-3.0)

Size:

57 data points

Data

Download dataset as tab-delimited text — use the following character encoding:

1 Date/time start	2 Latitude	3 Longitude	4 dd [deg]	5 ff [m/s]	6 Landmark	7 Course	8 Distance [arbitrary units]	9 Decl [deg]	10 Wind dir descr	11 Wind force descr	12 ww	13 State sea descr	21 ID
1750-03-09T13:00	-12.40	-9.47	115	4.9	ST HELENA	NWBN	105.00	-9	SEBE, SEBS, SEBE	LIGHT GALES TOWARDS NOON INCREASING	FAIR	SMOOTH WATER	3443
1750-03-10T13:00	-11.18	-10.78	115	4.6	ST HELENA	NWBN	110.00	-9	SE, SEBE	LIGHT GALES	FAIR	SMOOTH WATER	3444
1750-03-11T13:00	-9.87	-12.03	137	4.6	ST HELENA	NWBN	108.00	-9	SE, SEBS	LIGHT GALES	FAIR	SMOOTH WATER	3445