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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 La Boussole cruise from Europa to Madere started at 1785-08-01 [dataset]. Nederlands Instituut voor Wetenschappelijke Inform, Amsterdam, Netherland, PANGAEA, https://doi.org/10.1594/PANGAEA.750046, 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: 41.120833 * Median Longitude: -10.675833 * South-bound Latitude: 32.950000 * West-bound Longitude: -15.420000 * North-bound Latitude: 48.180000 * East-bound Longitude: -5.220000
Date/Time Start: 1785-08-01T12:00:00 * Date/Time End: 1785-08-12T13:00:00
Event(s):
La_Boussole_17850801_NIWI-F-1573 * Latitude Start: 48.180000 * Longitude Start: -5.220000 * Latitude End: 32.130000 * Longitude End: -16.570000 * Date/Time Start: 1785-08-01T00:00:00 * Date/Time End: 1785-08-12T00:00:00 * Campaign: Cliwoc_cruise * Method/Device: Underway cruise track measurements (CT) * Comment: Ship: La Boussole (Exploration Ves), Voyage: Europa - Madere, 1st Observer: J.F.G. de La Perouse (Kapitein), Other ship information: 450 TONS, THREE MASTS, SQUARE RIGGED, COMPLEMENT 113. HET GEDRUKTE BOEK HEET: VOYAGE DE LA PEROUSE AUTOUR DU MONDE. (1797), GEREDIGEERD DOOR M.L.A. MILET-MUREAU. HET BETREFT EEN ZEER BEKENDE REIS WAAROVER OP INTERNET VEEL IS GEPUBLICEERD. HET DERDE DEEL BEVAT EEN TABEL MET METEREOLOGISCHE GEGEVENS, DEZE IS HIER VERWERKT. HET SCHIP VOER IN KONVOOI MET L'ASTROLABE, DIT JOURNAAL IS OOK IN TABELVORM WEERGEGEVEN EN GEEFT OOK UITGEBREIDE WEERGEGEVENS.
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
Pressure, atmosphericPPPPhPaNo temperature correction was applied. The following factors have been used for the conversion to hPa: 2.54 cm in an inch; 13.596 specific gravity of mercury; 980.65 cm/s gravity at 45° latitude
Temperature, airTTT°C
LandmarkLandmarkName of first landmark
CommentCommentOther remarks, that were not possible to put in the other remark fields
10 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.
11 Sensor readingReadingarbitrary unitsReading of the (outside) air thermometer
12 Sensor readingReadingarbitrary unitsReading of the air pressure
13 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.
14 Wind force descriptionWind force descrAll reported wind forces on this day
15 Present weatherwwWeather description
16 GustsGusts1 If wind gusts are reported
17 Precipitation/RainRain1 If rain was reported
18 FogFog1 If fog was reported
19 Snow typeSnow1 If snow was reported
20 ThunderThunder1 If thunder and or lightning was reported
21 HailHail1 If hail was reported
22 Sea iceSea ice1 If sea-ice or icebergs were reported
23 IdentificationIDCLIWOC 2.1 line number
Size:
215 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...)

PPPP [hPa]
(No temperature correction was...)

TTT [°C]

Landmark
(Name of first landmark)

Comment
(Other remarks, that were not ...)
10 
Decl [deg]
(It is generally accepted by t...)
11 
Reading [arbitrary units]
(Reading of the (outside) air ...)
12 
Reading [arbitrary units]
(Reading of the air pressure)
13 
Wind dir descr
(All reported wind directions ...)
14 
Wind force descr
(All reported wind forces on t...)
15 
ww
(Weather description)
16 
Gusts
(1 If wind gusts are reported)
17 
Rain
(1 If rain was reported)
18 
Fog
(1 If fog was reported)
19 
Snow
(1 If snow was reported)
20 
Thunder
(1 If thunder and or lightning...)
21 
Hail
(1 If hail was reported)
22 
Sea ice
(1 If sea-ice or icebergs were...)
23 
ID
(CLIWOC 2.1 line number)
1785-08-01T12:0048.18-5.22671016.614.4-2311.50280200.00ELE TEMPS COUVERT, DE LA PLUIE0000000131445
1785-08-02T12:0047.20-6.771379.31007.617.5-2114.00271100.00SSEBON FRAISNÉBULEUX0000000131446
1785-08-03T13:0047.00-8.05158997.415.9-2212.75270705.00SPAR RAFALESCOUVERT, DE LA PLUIE0000000131447
1785-08-04T13:0045.58-9.05236.71006.417.5-2214.00271005.00NEPETIT FRAISBEAU0000000131448
1785-08-05T13:0044.25-8.742936.71022.618.1-2214.50280400.00NWPETIT FRAISBEAU0000000131449
1785-08-06T13:0043.42-9.3716.71022.618.8-2215.00280400.00NNEPETIT FRAISNUAGEUX0000000131450
1785-08-07T13:0041.32-11.69259.31022.618.8-2015.00280400.00NEBON FRAISNUAGEUX0000000131451
1785-08-08T13:0038.98-12.42259.31018.418.8-2015.00280205.00NEBON FRAISNUAGEUX0000000131452
1785-08-09T13:0036.87-12.99269.31023.319.4-1915.50280402.00NEBON FRAISBEAU0000000131453
1785-08-10T13:0034.67-14.37266.71019.620.4-1916.33280300.00NEPETIT FRAISBEAU0000000131454
1785-08-11T13:0033.03-14.0246.71019.521.3LES ÎLES DÉSERTES (20:00 H)-1917.00280208.00NNEPETIT FRAISBEAU0000000131455
1785-08-12T13:0032.95-15.4246.71019.521.3MOUILLÉ DANS LA RADE DE FUNCHAL, ÎLE DE MADÈRE (20:00H)-1917.00280208.00NNEPETIT FRAISNÉBULEUX0000000131456