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: -20.126667 * Median Longitude: 61.126667 * South-bound Latitude: -20.580000 * West-bound Longitude: 60.730000 * North-bound Latitude: -19.600000 * East-bound Longitude: 61.530000

Date/Time Start: 1761-11-01T00:00:00 * Date/Time End: 1761-11-30T08:00:00

Event(s):

Chatham_17611101_NMM_ADM/L/C124 * Date/Time Start: 1761-11-01T00:00:00 * Date/Time End: 1761-11-30T00:00:00 * Campaign: * Method/Device: Underway cruise track measurements (CT) * Comment: Ship: Chatham (4th Rate Frigate), Voyage: Rodriquez - Table Bay, 1st Observer: Thomas Lynn (Captain), 2nd Observer: Henry Dodd (2nd Officer/Lieutenant), Company: Royal Navy, Other ship information: 50G 1055BM

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	-	-		1 If position is considered to be coastal (in port or near coastal disturbances)
10	Course	Course		Course of the ship during the past 24 hours
11	Distance	Distance	arbitrary units	Distance travelled during the previous 24 hours
12	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.
13	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.
14	Current direction description	Cur dir descr		Direction of the current. This direction points to where the current is flowing towards to.
15	Wind force description	Wind force descr		All reported wind forces on this day
16	State of the sea description	State sea descr
17	Clearness	Clearness
18	Gusts	Gusts		1 If wind gusts are reported
19	Precipitation/Rain	Rain		1 If rain was reported
20	Fog	Fog		1 If fog was reported
21	Snow type	Snow		1 If snow was reported
22	Thunder	Thunder		1 If thunder and or lightning was reported
23	Hail	Hail		1 If hail was reported
24	Sea ice	Sea ice		1 If sea-ice or icebergs were reported
25	Identification	ID		CLIWOC 2.1 line number

License:

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

Size:

473 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 - (1 If position is considered t...)	10 Course (Course of the ship during the...)	11 Distance [arbitrary units] (Distance travelled during the...)	12 Decl [deg] (It is generally accepted by t...)	13 Wind dir descr (All reported wind directions ...)	14 Cur dir descr (Direction of the current. Thi...)	15 Wind force descr (All reported wind forces on t...)	16 State sea descr	17 Clearness	25 ID (CLIWOC 2.1 line number)
1761-11-01T00:00	-19.18			19.0	DIEGO RAYS	NBW	5							FRESH GALES		CLOUDY	40924
1761-11-02T00:00	-19.60			6.7	DIEGO RAYS	SBW	4							MODERATE		CLOUDY	40925
1761-11-03T00:00	-19.53			6.7	DIEGO RAYS	SWBW1/2W	5							MODERATE		CLOUDY	40926
1761-11-04T00:00	-19.55		113	6.7	DIEGO RAYS	S	19					SEBE, ESE, SEBE, ESE		MODERATE		CLOUDY	40927
1761-11-05T00:00	-19.73		101	6.7	DIEGO RAYS	ESE	6					ESE, WBS, SEBE, EBS		MODERATE		FAIR	40928
1761-11-06T00:00	-20.45		113	6.7	DIEGO RAYS		6					EBS, ESE, SEBE, ESE		MODERATE		CLEAR	40929
1761-11-07T00:00	-20.08		90	6.7	SE PART OF THE ISLAND	N	5					EBS, ESE, E		MODERATE		CLEAR	40930
1761-11-08T00:00	-19.70		113	1.0	DIEGO RAYS	SW	4	1				ESE, SE, SEBE, ESE		MOSTLY LIGHT AIRS		CLEAR	40931
1761-11-09T00:00	-19.78		124	6.7	DIEGO RAYS	WBS	4	1				SE, E, EBS, SEBE		MODERATE		CLOUDY	40932
1761-11-10T00:00	-19.72		124	6.7	DIEGO RAYS	WSW	9					E, SEBE		MODERATE		CLOUDY	40933
1761-11-11T00:00	-19.75		101	6.7	DIEGO RAYS	W1/2S	5					ESE, SEBE, EBS		MODERATE		CLEAR	40934
1761-11-12T00:00	-19.62		101	6.7	DIEGO RAYS		5					EBS		MODERATE		CLEAR	40935
1761-11-13T00:00	-19.45		101	6.7	DIEGO RAYS	SW1/2S	10					EBS		MODERATE		CLEAR	40936
1761-11-14T00:00	-19.63		169	9.3	DIEGO RAYS	SWBW	5					SEBE, SE, SBE		FRESH BREEZES		CLOUDY	40937
1761-11-15T00:00			124	6.7	DIEGO RAYS							SEBS, SE, SEBE		MODERATE		CLOUDY	40938
1761-11-16T00:00	-19.50		79	6.7	DIEGO RAYS	WBN	8					ESE, E, EBN		MODERATE		HAZY	40939
1761-11-17T00:00			45	1.0	DIEGO RAYS	WNW	5					EBN, NE		LIGHT AIRS		CLEAR	40940
1761-11-18T00:00			68	6.7	DIEGO RAYS	W1/2N	9					NEBE, ENE		MODERATE		HAZY	40941
1761-11-19T00:00			11	1.0	DIEGO RAYS	WSW	6					NE, NNE, NBE		LIGHT AIRS		HAZY	40942
1761-11-20T00:00			361	0.0	DIEGO RAYS	SBW	5					CALM	TO THE NNW	CALM		CLEAR	40943
1761-11-21T00:00	-19.33		361	0.0	DIEGO RAYS	S1/2W	5					CALM		CALM		CLEAR	40944
1761-11-22T00:00			45	0.0	DIEGO RAYS	SEBS	5					NE		CALM		CLEAR	40945
1761-11-23T00:00			90	1.0	DIEGO RAYS	EBS	7					ESE, E		LIGHT AIRS		CLOUDY	40946
1761-11-24T00:00	-19.65		135	6.7	DIEGO RAYS	E1/2S	9					ESE, SE, SEBE, SE		MODERATE BREEZES		CLOUDY	40947
1761-11-25T00:00			124	6.7	DIEGO RAYS	EBN	19					SE, SEBE		MODERATE		CLEAR	40948
1761-11-26T00:00				15.4	DIEGO RAYS	E	12							MODERATE GALES		HAZY	40949
1761-11-27T00:00				15.4	DIEGO RAYS	S76E	27							MODERATE GALES		HAZY	40950
1761-11-28T08:00	-19.60	61.53		6.7	DIEGO RAYS	S85:20W	35		S77W	36.00	-13			MODERATE		CLOUDY	40951
1761-11-29T08:00	-20.20	61.12		19.0	DIEGO RAYS	N39:30E	46		S52W	41.00	-13			FRESH GALES	GREAT SWELL FROM SE	HAZY	40952
1761-11-30T08:00	-20.58	60.73		6.7	DIEGO RAYS	N72E	56		S47W	31.00	-13			MODERATE		CLOUDY	40953