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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 ACASTA cruise from Cork to Carlisle Bay started at 1807-02-24. National Maritime Museum, Greenwich, United Kingdom, PANGAEA, https://doi.org/10.1594/PANGAEA.747143, 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). 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
Coverage:
Median Latitude: 27.260000 * Median Longitude: -27.016250 * South-bound Latitude: 13.130000 * West-bound Longitude: -57.430000 * North-bound Latitude: 51.380000 * East-bound Longitude: -8.020000
Date/Time Start: 1807-02-24T13:00:00 * Date/Time End: 1807-04-04T16:00:00
Event(s):
Acasta_18070224_NMM_RUSI/NM/180/6 * Latitude Start: 50.630000 * Longitude Start: -10.420000 * Latitude End: 13.000000 * Longitude End: -60.150000 * Date/Time Start: 1807-02-24T00:00:00 * Date/Time End: 1807-04-04T00:00:00 * Campaign: Cliwoc_cruise * Device: Underway cruise track measurements (CT) * Comment: Ship: Acasta (5th Rate Frigate), Voyage: Cork - Carlisle Bay Barbados, 1st Observer: Philip Beaver (Captain), Company: Royal Navy, Other ship information: 40G 1127BM
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethodComment
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
6Pressure, 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
7Temperature, airTTT°C
8LandmarkLandmarkName of first landmark
9BearingBearingBearing of the first landmark
10Distance to landmarkDistancearbitrary unitsDistance to the first landmark
11CourseCourseCourse of the ship during the past 24 hours
12DistanceDistancearbitrary unitsDistance travelled during the previous 24 hours
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.
14Sensor readingReadingarbitrary unitsReading of the (outside) air thermometer
15Sensor readingReadingarbitrary unitsReading of the air pressure
16Wind direction descriptionWind dir descrAll reported wind directions on this day. The wind direction is the direction that points to where the wind comes from.
17Wind force descriptionWind force descrAll reported wind forces on this day
18Present weatherwwWeather description
19Precipitation descriptionPrecip descr
20ClearnessClearness
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
28IdentificationIDCLIWOC 2.1 line number
Size:
941 data points

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