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García-Herrera, Ricardo; Können, Gunther P; Wheeler, Dennis A; Prieto, Maria del Rosario; Jones, Philip D; Koek, Frits B (2010): Meteorological observations during RATTLESNAKE cruise from St. Helena to Table Bay started at 1801-08-22 [dataset]. National Maritime Museum, Greenwich, United Kingdom, PANGAEA, https://doi.org/10.1594/PANGAEA.751701, In: Jones, Philip D; Wheeler, Dennis A; Können, Gunther P; Koek, Frits B; Prieto, Maria del Rosario; García-Herrera, Ricardo (2007): Climatological observations from ship logbooks between 1750 and 1854 (release 2.1) [dataset publication series]. PANGAEA, https://doi.org/10.1594/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
Funding:
Fifth Framework Programme (FP5), grant/award no. EVK2-CT-2000-00090: Climatological Database for the Worlds Oceans: 1750-1854
Coverage:
Median Latitude: -28.074348 * Median Longitude: 0.554783 * South-bound Latitude: -34.330000 * West-bound Longitude: -10.180000 * North-bound Latitude: -17.180000 * East-bound Longitude: 15.070000
Date/Time Start: 1801-08-22T12:00:00 * Date/Time End: 1801-09-14T00:00:00
Event(s):
Rattlesnake_18010822_NMM_ADM/L/R57 * Latitude Start: -15.890000 * Longitude Start: -5.750000 * Latitude End: -34.430000 * Longitude End: 16.950000 * Date/Time Start: 1801-08-22T00:00:00 * Date/Time End: 1801-09-14T00:00:00 * Campaign: Cliwoc_cruise * Method/Device: Underway cruise track measurements (CT) * Comment: Ship: Rattlesnake (Sloop), Voyage: St Helena - Table Bay, 1st Observer: Roger Curtis (Captain), Company: Royal Navy, Other ship information: 16G 330BM
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
DATE/TIMEDate/TimeGeocode
LATITUDELatitudeGeocode
LONGITUDELongitudeGeocode
Wind directiondddegWind 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.
Wind speedffm/scalculated from the descriptive terms of wind force given in the observations
LandmarkLandmarkName of first landmark
BearingBearingBearing of the first landmark
Distance to landmarkDistancearbitrary unitsDistance to the first landmark
CourseCourseCourse of the ship during the past 24 hours
10 DistanceDistancearbitrary unitsDistance travelled during the previous 24 hours
11 DeclinationDecldegIt 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 descriptionWind dir descrAll reported wind directions on this day. The wind direction is the direction that points to where the wind comes from.
13 Wind force descriptionWind force descrAll reported wind forces on this day
14 Precipitation descriptionPrecip descr
15 State of the sea descriptionState sea descr
16 ClearnessClearness
17 GustsGusts1 If wind gusts are reported
18 Precipitation/RainRain1 If rain was reported
19 FogFog1 If fog was reported
20 Snow typeSnow1 If snow was reported
21 ThunderThunder1 If thunder and or lightning was reported
22 HailHail1 If hail was reported
23 Sea iceSea ice1 If sea-ice or icebergs were reported
24 IdentificationIDCLIWOC 2.1 line number
Size:
454 data points

Data

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


Date/Time

Latitude

Longitude

dd [deg]
(Wind direction (from which th...)

ff [m/s]
(calculated from the descripti...)

Landmark
(Name of first landmark)

Bearing
(Bearing of the first landmark)

Distance [arbitrary units]
(Distance to the first landmark)

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 
Precip descr
15 
State sea descr
16 
Clearness
17 
Gusts
(1 If wind gusts are reported)
18 
Rain
(1 If rain was reported)
19 
Fog
(1 If fog was reported)
20 
Snow
(1 If snow was reported)
21 
Thunder
(1 If thunder and or lightning...)
22 
Hail
(1 If hail was reported)
23 
Sea ice
(1 If sea-ice or icebergs were...)
24 
ID
(CLIWOC 2.1 line number)
1801-08-22T12:00-17.18-7.231171.0WEST POINT OF THE ISLANDN48W1-18VARIABLE, SEVARIABLE LIGHT AIRSCLOUDY0000000207686
1801-08-23T13:00-18.63-8.721206.7ST HELENAN46:09E78-15SEMODERATE BREEZES, AM MODERATECLOUDY0000000207687
1801-08-24T13:00-20.00-10.033626.7ST HELENAS9:32W116-15SE, VARIABLELIGHT BREEZES, AM MODERATE BREEZESPLEASANT WEATHER0000000207688
1801-08-25T13:00-20.93-10.183621.0TRISTAN DE CINTEAS9:35W329S8W56.00-15SE, VARIABLELIGHT AIRS, AT 1 CALM, AT 3 A LIGHT BREEZE, AM LIGHT AIRSCLOUDY0000000207689
1801-08-26T13:00-22.98-9.87876.7CAPE OF GOOD HOPES65:07W546S8E124.00-14E, EBSMODERATESWELL FROM THE SEPLEASANT WEATHER, AM CLOUDY0000000207690
1801-08-27T13:00-25.07-9.923626.7CAPE OF GOOD HOPES69:02E526S1W125.00-14ESE, VARIABLEMODERATE BREEZESCLOUDY WEATHER0000000207691
1801-08-28T13:00-26.32-9.08656.7CAPE OF GOOD HOPES71:01E502S31E88.00-14NWBN, EBNLIGHT BREEZES, AM MODERATE BREEZESAM RAINPLEASANT WEATHER, AM CLOUDY0100000207692
1801-08-29T12:00-26.88-7.232991.0CAPE OF GOOD HOPES71:27E477S62E71.00-16VARIABLE, NWMODERATE BREEZES, AM LIGHT AIRSPLEASANT WEATHER, AM CLOUDY0000000207693
1801-08-30T12:00-27.48-6.472092.6CAPE OF GOOD HOPES71:31E449S65E87.00-16VARIABLE, SWLIGHT AIRS, AM LIGHT BREEZESCLOUDY0000000207694
1801-08-31T12:00-28.17-4.2026612.3CAPE OF GOOD HOPES71:54E406S71E129.00-15SWBS, WBNMODERATE BREEZES, AM STRONG BREEZES AND SQUALLYAM RAINPLEASANT WEATHER0100000207695
1801-09-01T12:00-28.40-2.771886.7CAPE OF GOOD HOPES71:45E382S80E77.00-15VARIABLE, SW, SSWMODERATE, AM MODERATE BREEZESPLEASANT WEATHER, AM CLOUDY0000000207696
1801-09-02T12:00-29.63-0.581859.3CAPE OF GOOD HOPES75:15E337S57E135.00-18VARIABLE, SSWMODERATE BREEZES, AT 2 FRESH BREEZES AND SQUALLYCLOUDY0000000207697
1801-09-03T12:00-30.902.032189.3CAPE OF GOOD HOPES75:28E286S61E155.00-18SW, SWBWFRESH BREEZESSWELL FROM THE SWCLOUDY0000000207698
1801-09-04T12:00-31.173.673626.7CAPE OF GOOD HOPES75:30E257S76E86.00-21SE, VARIABLEMODERATE BREEZES AND SQUALLY WEATHER, AT 6 A STEADY BREEZE, AM MODERATEAM CLOUDY0000000207699
1801-09-05T12:00-32.254.63696.7CAPE OF GOOD HOPES79:2E235S40E76.00-21VARIABLE-NBE, EMODERATECLOUDY WEATHER0000000207700
1801-09-06T12:00-32.736.9730612.3CAPE OF GOOD HOPES79:39E195S76E122.00-20SSW, NWBNMODERATE, AT 11 FRESH BREEZES AND SQUALLY, AM STRONG BREEZES AND SQUALLYAT 11 RAIN, AM RAINCLEAR WEATHER0100000207701
1801-09-07T11:00-32.209.0019119.0CAPE OF GOOD HOPES73:55E165S73E108.00-23VARIABLE, SWBSFRESH BREEZES AND SQUALLY, AM FRESH GALES AND SQUALLYAT 9 HAIL0100010207702
1801-09-08T11:00-31.3310.451579.3CAPE OF GOOD HOPES65:34E147N58E84.00-23SBW, SSTRONG GALES AND SQUALLY, AT 8 MORE MODERATE, AT 11AM FRESH BREEZESAT 11 AM CLOUDY0000000207703
1801-09-09T11:00-31.2311.403629.3CAPE OF GOOD HOPES61:16E135N75E50.00-23S, VARIABLEFRESH BREEZESA HEAVY SWELL FROM THE SSECLOUDY0000000207704
1801-09-10T11:00-31.3212.471916.7CAPE OF GOOD HOPES57:50E119S84E56.00-23VARIABLE, SWBSMODERATE BREEZES, AM MODERATE BREEZES AND SQUALLYAM RAINSWELL FROM THE SOUTHWARDCLOUDY0100000207705
1801-09-11T11:00-32.8811.271361.0CAPE OF GOOD HOPES75:02E125S33W114.00-22SSEMODERATE, AM STRONG BREEZES, AT NOON LIGHT AIRSCLOUDY WEATHER0000000207706
1801-09-12T11:00-33.7012.081699.3CAPE OF GOOD HOPEN81:35E107S40E65.00-22NWBW, NNW, SBWLIGHT AIRS, AT 1 STEADY BREEZESCLOUDY0000000207707
1801-09-13T11:00-34.3315.073356.7CAPE OF GOOD HOPES80:57E56S76E153.00-25VARIABLE, NMODERATE, AM MODERATE BREEZESPLEASANT WEATHER, AM CLOUDY0000000207708
1801-09-14T00:00293CAPE POINTEBN5VARIABLE, WNWFRESH BREEZES, AM STRONG GALES AND SQUALLY,AT 11 SQUALLY WEATHERCLOUDY WEATHER0000000207709