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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 MARTIN cruise from Charleston to Plymouth started at 1771-10-21 [dataset]. National Maritime Museum, Greenwich, United Kingdom, PANGAEA, https://doi.org/10.1594/PANGAEA.750648, 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: 35.799524 * Median Longitude: -62.869524 * South-bound Latitude: 30.330000 * West-bound Longitude: -78.020000 * North-bound Latitude: 45.680000 * East-bound Longitude: -40.550000
Date/Time Start: 1771-10-21T17:00:00 * Date/Time End: 1771-11-10T15:00:00
Event(s):
Martin_17711021_NMM_ADM/L/M73 * Latitude Start: 31.830000 * Longitude Start: -77.920000 * Latitude End: 50.299000 * Longitude End: -4.150000 * Date/Time Start: 1771-10-21T00:00:00 * Date/Time End: 1771-11-10T00:00:00 * Campaign: Cliwoc_cruise * Method/Device: Underway cruise track measurements (CT) * Comment: Ship: Martin (Sloop), Voyage: Charleston - Plymouth, 1st Observer: Thomas Hayward (Captain), 2nd Observer: John Holloway (1st Officer/Master), Company: Royal Navy, Other ship information: 24G 283BM
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 Present weatherwwWeather description
15 Precipitation descriptionPrecip descr
16 State of the sea descriptionState sea descr
17 ClearnessClearness
18 GustsGusts1 If wind gusts are reported
19 Precipitation/RainRain1 If rain was reported
20 FogFog1 If fog was reported
21 Snow typeSnow1 If snow was reported
22 ThunderThunder1 If thunder and or lightning was reported
23 HailHail1 If hail was reported
24 Sea iceSea ice1 If sea-ice or icebergs were reported
25 CommentComment
26 IdentificationIDCLIWOC 2.1 line number
Size:
394 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 
ww
(Weather description)
15 
Precip descr
16 
State sea descr
17 
Clearness
18 
Gusts
(1 If wind gusts are reported)
19 
Rain
(1 If rain was reported)
20 
Fog
(1 If fog was reported)
21 
Snow
(1 If snow was reported)
22 
Thunder
(1 If thunder and or lightning...)
23 
Hail
(1 If hail was reported)
24 
Sea ice
(1 If sea-ice or icebergs were...)
25 
Comment
26 
ID
(CLIWOC 2.1 line number)
1771-10-21T17:0032.17-78.02362CHARLESTOWN BARN71W34S71:45E101.004VARIABLEVARIABLEVARIABLE0000000a trivial correction was made in this observation163532
1771-10-22T17:0031.97-76.90362CHARLESTOWN BARN72W53S75E58.003VARIABLEVARIABLEVARIABLEHARD RAIN0100000163533
1771-10-23T17:0031.67-74.42262CHARLESTOWN BARN76W95S82E130.003SBW-WBSVARIABLEVARIABLE0000000163534
1771-10-24T17:0031.20-71.77226CHARLESTOWN BARN77W191S78E138.001WBS, SWVARIABLETHUNDER AND LIGHTNING. VARIABLERAIN0100100163535
1771-10-25T17:0030.33-70.354619.0CHARLESTOWN BARN73W170S56E93.001NEFRESH GALESCLOUDY0000000163536
1771-10-26T17:0030.43-70.276919.0CHARLESTOWN BARN74W171S39E7.001NE-ENEFRESH GALESCLOUDY0000000163537
1771-10-27T17:0031.83-70.15696.7CHARLESTOWN BARN84W166S4:30E84.001ENEFIRST FRESH GALES, MID AND LATTER MODERATECLEAR0000000163538
1771-10-28T17:0033.22-69.641331.0CHARLESTOWN BARS86W172N17E87.00-2NE, SEFIRST MODERATE, LATTER LIGHT AIRS WITH CALMS0000000163539
1771-10-29T17:0033.35-68.59358CHARLESTOWN BARS86W190N82E57.00-2E-NVARIABLEVARIABLE0000000163540
1771-10-30T17:0033.45-68.546619.0CHARLESTOWN BARS85W191N26E7.00-2NE-ENEFRESH GALES AND SQUALLY0000000a trivial correction was made in this observation163541
1771-10-31T17:0034.03-68.29223CHARLESTOWN BARS85W196N20:15E37.00-2NE-SWVARIABLEVARIABLE0000000163542
1771-11-01T16:0034.80-65.25289CHARLESTOWN BARS80W247N63:30E182.00-4SW-WNWSQUALLYRAIN0100000163543
1771-11-02T16:0035.80-63.152896.7CHARLESTOWN BARS77W283N60E120.00-4SW-WNWMODERATECLOUDY0000000163544
1771-11-03T16:0036.00-61.342436.7CHARLESTOWN BARS78W314N70E218.00-5WNW-WSWMODERATECLEAR0000000163545
1771-11-04T16:0037.63-57.42259CHARLESTOWN BARS75W380N62E212.00-11WSW, WSQUALLYTHUNDER AND LIGHTNING0000100163546
1771-11-05T16:0039.03-53.95259CHARLESTOWN BARS73W438N62E184.00-11WSW, WVARIABLE AND SQUALLYTHUNDER AND LIGHTNINGGREAT SEA FROM THE SW0000100163547
1771-11-06T15:0040.38-51.04168CHARLESTOWN BARS71W487N59E156.00-12SW-SVARIABLE AND SQUALLYTHUNDER AND LIGHTNINGGREAT SEA FROM THE SW0000100163548
1771-11-07T15:0041.72-48.65213CHARLESTOWN BARS70W528N53E134.00-12SWVARIABLE AND SQUALLYTHUNDER AND LIGHTNINGGREAT SEA FROM THE SW0000100163549
1771-11-08T15:0042.73-46.952082.6CHARLESTOWN BARS68W552N50E125.00-17SWFIRST AND MID VARIABLE AND SQUALLY, LATTER LITTLE WINDGREAT SEA FROM THE SWCLOUDY0000000163550
1771-11-09T15:0044.37-45.02362CHARLESTOWN BARS66W591N52E162.00-17VARIABLEFIRST LITTLE WIND, LATTER FRESHRAIN0100000163551
1771-11-10T15:0045.68-40.5525219.0CHARLESTOWN BARS66W659N61E164.00-18WFRESH GALESRAINHAZY0100000163552