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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 San Pedro de Alcantara cruise from Montevideo to Callao de Lima started at 1774-11-29 [dataset]. Archivo Museo Naval Madrid, Spain, PANGAEA, https://doi.org/10.1594/PANGAEA.751908, 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: -44.649178 * Median Longitude: -71.775068 * South-bound Latitude: -60.930000 * West-bound Longitude: -86.500000 * North-bound Latitude: -14.500000 * East-bound Longitude: -52.850000
Date/Time Start: 1774-11-29T16:00:00 * Date/Time End: 1775-02-13T17:00:00
Event(s):
San_Pedro_de_Alcantara_17741129_MS_941 * Latitude Start: -35.970000 * Longitude Start: -55.650000 * Latitude End: -12.200000 * Longitude End: -78.770000 * Date/Time Start: 1774-11-29T00:00:00 * Date/Time End: 1775-02-13T00:00:00 * Campaign: Cliwoc_cruise * Method/Device: Underway cruise track measurements (CT) * Comment: Ship: San Pedro De Alcantara (Navío), Voyage: Montevideo - Callao (Lima), 1st Observer: Capitan
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DATE/TIMEDate/TimeGeocode
2LATITUDELatitudeGeocode
3LONGITUDELongitudeGeocode
4Wind 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.
5Wind speedffm/scalculated from the descriptive terms of wind force given in the observations
6LandmarkLandmarkName of first landmark
7BearingBearingBearing of the first landmark
8Distance to landmarkDistancearbitrary unitsDistance to the first landmark
9CourseCourseCourse of the ship during the past 24 hours
10DistanceDistancearbitrary unitsDistance travelled during the previous 24 hours
11CommentCommentOther remarks, that were not possible to put in the other remark fields
12Comment 2 (continued)Comm 2Other remarks
13DeclinationDecldegIt 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.
14Wind direction descriptionWind dir descrAll reported wind directions on this day. The wind direction is the direction that points to where the wind comes from.
15Current direction descriptionCur dir descrDirection of the current. This direction points to where the current is flowing towards to.
16Current speed descriptionV descr
17Wind force descriptionWind force descrAll reported wind forces on this day
18Present weatherwwWeather description
19Precipitation descriptionPrecip descr
20State of the sea descriptionState sea descr
21GustsGusts1 If wind gusts are reported
22Precipitation/RainRain1 If rain was reported
23FogFog1 If fog was reported
24Snow typeSnow1 If snow was reported
25ThunderThunder1 If thunder and or lightning was reported
26HailHail1 If hail was reported
27Sea iceSea ice1 If sea-ice or icebergs were reported
28CommentComment
29IdentificationIDCLIWOC 2.1 line number
Size:
1198 data points

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