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: 21.617143 * Median Longitude: 65.332857 * South-bound Latitude: 19.050000 * West-bound Longitude: 59.390000 * North-bound Latitude: 24.520000 * East-bound Longitude: 71.090000

Date/Time Start: 1773-04-18T08:00:00 * Date/Time End: 1773-04-24T07:00:00

Event(s):

Swallow_17730418_NMM_ADM/L/S569 * Latitude Start: 24.520000 * Longitude Start: 59.390000 * Latitude End: 18.500000 * Longitude End: 72.820000 * Date/Time Start: 1773-04-18T00:00:00 * Date/Time End: 1773-04-24T00:00:00 * Campaign: * Method/Device: Underway cruise track measurements (CT) * Comment: Ship: Swallow (Sloop), Voyage: Muscat - Bombay, 1st Observer: Thomas Underwood (Captain), 2nd Observer: James Robert Mosse (1st Officer/Master), Company: Royal Navy, Other ship information: 302BM

Parameter(s):

#	Name	Short Name	Unit	Comment
1	DATE/TIME	Date/Time		Geocode
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	Bearing	Bearing		Bearing of the first landmark
8	Distance to landmark	Distance	arbitrary units	Distance to the first landmark
9	Course	Course		Course of the ship during the past 24 hours
10	Distance	Distance	arbitrary units	Distance travelled during the previous 24 hours
11	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.
12	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.
13	Wind force description	Wind force descr		All reported wind forces on this day
14	Present weather	ww		Weather description
15	Clearness	Clearness
16	Gusts	Gusts		1 If wind gusts are reported
17	Precipitation/Rain	Rain		1 If rain was reported
18	Fog	Fog		1 If fog was reported
19	Snow type	Snow		1 If snow was reported
20	Thunder	Thunder		1 If thunder and or lightning was reported
21	Hail	Hail		1 If hail was reported
22	Sea ice	Sea ice		1 If sea-ice or icebergs were reported
23	Comment	Comment
24	Identification	ID		CLIWOC 2.1 line number

License:

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

Size:

139 data points

Data

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

1 Date/Time	2 Latitude	3 Longitude	4 dd [deg] (Wind direction (from which th...)	5 ff [m/s] (calculated from the descripti...)	6 Landmark (Name of first landmark)	7 Bearing (Bearing of the first landmark)	8 Distance [arbitrary units] (Distance to the first landmark)	9 Course (Course of the ship during the...)	10 Distance [arbitrary units] (Distance travelled during the...)	11 Decl [deg] (It is generally accepted by t...)	12 Wind dir descr (All reported wind directions ...)	13 Wind force descr (All reported wind forces on t...)	14 ww (Weather description)	15 Clearness	20 Thunder (1 If thunder and or lightning...)	23 Comment	24 ID (CLIWOC 2.1 line number)
1773-04-18T08:00	24.52	59.39	288		CAPE JAQUES	N50W	38	S50E	114.00	-5	NNW, SW, WNW		CLOUDY, LIGHTNING	CLOUDY	1	a trivial correction was made in this observation	248267
1773-04-19T08:00	23.58	61.31	265	6.7	CAPE JAQUES	N56W	77	S62E	119.00	-5	W	MODERATE		FAIR	0	a trivial correction was made in this observation	248268
1773-04-20T08:00	22.13	64.18	221	15.4	CAPE JAQUES	N58W	136	S61E	179.00	-4	SW	MODERATE GALES		FAIR	0	a trivial correction was made in this observation	248269
1773-04-21T08:00	21.40	65.49	289	2.6	BOMBAY	S69E	133	S60E	89.00	-4	SW, WNW	LIGHT BREEZES		CLOUDY	0	a trivial correction was made in this observation	248270
1773-04-22T08:00	20.72	66.76	356	2.6	BOMBAY	S71E	107	S60E	82.00	-4	NW, N	LIGHT BREEZES		CLOUDY	0	a trivial correction was made in this observation	248271
1773-04-23T07:00	19.92	69.11	313	6.7	BOMBAY	S71E	60	S70E	141.00	-2	NW	MODERATE		HAZY	0	a trivial correction was made in this observation	248272
1773-04-24T07:00	19.05	71.09	268	6.7	BOMBAY	S84E	20	S65E	52.00	-2	W	MODERATE		HAZY	0	a trivial correction was made in this observation	248273