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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 Atrevida cruise from Desconocido to Acapulco started at 1791-01-07 [dataset]. Archivo Museo Naval Madrid, Spain, PANGAEA, https://doi.org/10.1594/PANGAEA.750032, 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: 14.330806 * Median Longitude: -101.316774 * South-bound Latitude: 5.570000 * West-bound Longitude: -115.170000 * North-bound Latitude: 22.020000 * East-bound Longitude: -83.980000
Date/Time Start: 1791-01-07T18:00:00 * Date/Time End: 1791-04-20T00:00:00
Event(s):
La_Atrevida_17910107_MS_271_DOC_18 * Latitude Start: 6.250000 * Longitude Start: -83.980000 * Latitude End: 16.470000 * Longitude End: -99.880000 * Date/Time Start: 1791-01-07T00:00:00 * Date/Time End: 1791-04-20T00:00:00 * Campaign: Cliwoc_cruise * Method/Device: Underway cruise track measurements (CT) * Comment: Ship: La Atrevida (Corveta), Voyage: Desconocido (Mares De Nicaragua) - Acapulco, 1st Observer: Jose de Bustamante y Guerra (Comandante)
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
9LandmarkLandmarkName of second landmark
10--1 If position is considered to be coastal (in port or near coastal disturbances)
11CommentCommentLife on board
12CourseCourseCourse of the ship during the past 24 hours
13CommentCommentAny remark, found in the logbook on this particular day, about the ship, sails, rigging, etc.
14CommentCommentAny remark, found in the logbook on this particular day, about any biological item
15CommentCommentAny remark, found in the logbook on this particular day, about wars and fights in which this ship was involved
16CommentCommentOther remarks, that were not possible to put in the other remark fields
17Comment 2 (continued)Comm 2Other remarks
18Comment 3 (continued)Comm 3Other remarks
19Comment 4 (continued)Comm 4Other remarks
20DeclinationDecldegIt 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.
21Wind direction descriptionWind dir descrAll reported wind directions on this day. The wind direction is the direction that points to where the wind comes from.
22Current direction descriptionCur dir descrDirection of the current. This direction points to where the current is flowing towards to.
23Current speed descriptionV descr
24Wind force descriptionWind force descrAll reported wind forces on this day
25Present weatherwwWeather description
26Precipitation descriptionPrecip descr
27State of the sea descriptionState sea descr
28GustsGusts1 If wind gusts are reported
29Precipitation/RainRain1 If rain was reported
30FogFog1 If fog was reported
31Snow typeSnow1 If snow was reported
32ThunderThunder1 If thunder and or lightning was reported
33HailHail1 If hail was reported
34Sea iceSea ice1 If sea-ice or icebergs were reported
35IdentificationIDCLIWOC 2.1 line number
Size:
1087 data points

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