García-Herrera, Ricardo; Können, Gunther P; Wheeler, Dennis A; Prieto, Maria del Rosario; Jones, Philip D; Koek, Frits B (2010): Meteorological observations during BLANDFORD cruise from Madeira to Senegal started at 1750-07-12 [dataset]. National Maritime Museum, Greenwich, United Kingdom, PANGAEA, https://doi.org/10.1594/PANGAEA.746898, 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
Always quote citation above when using data! You can download the citation in several formats below.
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
Project(s):
Funding:
Fifth Framework Programme (FP5), grant/award no. EVK2-CT-2000-00090: Climatological Database for the Worlds Oceans: 1750-1854
Coverage:
Median Latitude: 20.481538 * Median Longitude: -18.016923 * South-bound Latitude: 14.470000 * West-bound Longitude: -20.530000 * North-bound Latitude: 28.950000 * East-bound Longitude: -15.510000
Event(s):
Blandford_17500712_NMM_ADM/L/B103 * Latitude Start: 32.130000 * Longitude Start: -16.570000 * Latitude End: 16.170000 * Longitude End: -17.650000 * Campaign: Cliwoc_cruise * Method/Device: Underway cruise track measurements (CT) * Comment: Ship: Blandford (Frigate), Start of voyage: 1750-07-23, End of voyage: 1750-08-05, Voyage: Madeira - Senegal, 1st Observer: Edward Pratten (Author), Company: Royal Navy, Other ship information: 20G, 442BM
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Date/time start | Date/time start | ||||
| 2 | LATITUDE | Latitude | Geocode | |||
| 3 | LONGITUDE | Longitude | Geocode | |||
| 4 | Wind direction | dd | deg | Wind 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. | ||
| 5 | Wind speed | ff | m/s | calculated from the descriptive terms of wind force given in the observations | ||
| 6 | Landmark | Landmark | Name of first landmark | |||
| 7 | Bearing | Bearing | Bearing of the first landmark | |||
| 8 | Distance to landmark | Distance | arbitrary units | Distance to the first landmark | ||
| 9 | Course | Course | Course of the ship during the past 24 hours | |||
| 10 | Distance | Distance | arbitrary units | Distance travelled during the previous 24 hours | ||
| 11 | Comment | Comment | Other remarks, that were not possible to put in the other remark fields | |||
| 12 | Declination | Decl | deg | It 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. | ||
| 13 | Wind direction description | Wind dir descr | All reported wind directions on this day. The wind direction is the direction that points to where the wind comes from. | |||
| 14 | Wind force description | Wind force descr | All reported wind forces on this day | |||
| 15 | Present weather | ww | Weather description | |||
| 16 | Precipitation description | Precip descr | ||||
| 17 | Clearness | Clearness | ||||
| 18 | Gusts | Gusts | 1 If wind gusts are reported | |||
| 19 | Precipitation/Rain | Rain | 1 If rain was reported | |||
| 20 | Fog | Fog | 1 If fog was reported | |||
| 21 | Snow type | Snow | 1 If snow was reported | |||
| 22 | Thunder | Thunder | 1 If thunder and or lightning was reported | |||
| 23 | Hail | Hail | 1 If hail was reported | |||
| 24 | Sea ice | Sea ice | 1 If sea-ice or icebergs were reported | |||
| 25 | Comment | Comment | ||||
| 26 | Identification | ID | CLIWOC 2.1 line number |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
283 data points
Data
| 1 Date/time start | 2 Latitude | 3 Longitude | 4 dd [deg] (Wind direction (from which th...) | 5 ff [m/s] (calculated from the descripti...) | 6 Landmark (Name of first landmark) | 7 Bearing (Bearing of the first landmark) | 8 Distance [arbitrary units] (Distance to the first landmark) | 9 Course (Course of the ship during the...) | 10 Distance [arbitrary units] (Distance travelled during the...) | 11 Comment (Other remarks, that were not ...) | 12 Decl [deg] (It is generally accepted by t...) | 13 Wind dir descr (All reported wind directions ...) | 14 Wind force descr (All reported wind forces on t...) | 15 ww (Weather description) | 16 Precip 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) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1750-07-23T13:00 | 28.95 | -15.73 | 32 | 15.4 | GRAND SALVAGE | N1/2W | 24 | SE | 72.00 | -13 | NE | MODERATE GALES | HAZY | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 29977 | ||||
| 1750-07-24T13:00 | 27.33 | -15.51 | 33 | 15.4 | GRAND SALVAGE | N8W | 54 | S3/4E | 98.00 | -12 | NE | MODERATE GALES | HAZY | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 29978 | ||||
| 1750-07-25T13:00 | 25.03 | -16.21 | 56 | 6.7 | GRAND SALVAGE | N4E | 101 | SBW1/2W | 144.00 | -12 | NNE-ENE | FIRST AND MIDDLE PART FRESH GALES, LATTER MODERATE | HAZY | 0 | 0 | 0 | 0 | 0 | 0 | 0 | a trivial correction was made in this observation | 29979 | |||
| 1750-07-26T13:00 | 24.48 | -16.76 | 362 | 6.7 | GRAND SALVAGE | N9E | 106 | SW1/2W | 35.00 | -12 | VARIABLE | MODERATE | HAZY | 0 | 0 | 0 | 0 | 0 | 0 | 0 | a trivial correction was made in this observation | 29980 | |||
| 1750-07-27T13:00 | 24.02 | -18.38 | 13 | 6.7 | GRAND SALVAGE | N20:45E | 130 | S66W | 99.00 | -10 | N, NNW, N, NNE | CALM UNTIL 4PM, THEN A MODERATE BREEZE | HAZY | 0 | 0 | 0 | 0 | 0 | 0 | 0 | a trivial correction was made in this observation | 29981 | |||
| 1750-07-28T13:00 | 22.25 | -19.28 | 36 | 6.7 | GRAND SALVAGE | NNE | 169 | SSW1/2W | 119.00 | CROSSED THE TROPIC OF CANCER | -9 | NE | MODERATE | HAZY | 0 | 0 | 0 | 0 | 0 | 0 | 0 | a trivial correction was made in this observation | 29982 | ||
| 1750-07-29T13:00 | 19.85 | -20.53 | 36 | 19.0 | GRAND SALVAGE | N22:10E | 222 | SSW1/2W | 161.00 | -9 | NE | FIRST PART MODERATE, LATTER FRESH GALES | FIRST PART FAIR, LATTER PART HAZY | 0 | 0 | 0 | 0 | 0 | 0 | 0 | a trivial correction was made in this observation | 29983 | |||
| 1750-07-30T13:00 | 17.63 | -19.46 | 36 | 6.7 | GRAND SALVAGE | N15E | 256 | SSE | 152.00 | -9 | NE | MODERATE | HAZY | 0 | 0 | 0 | 0 | 0 | 0 | 0 | a trivial correction was made in this observation | 29984 | |||
| 1750-07-31T13:00 | 16.38 | -18.93 | 37 | 6.7 | GRAND SALVAGE | NBE | 280 | S22E | 81.00 | -8 | NE | MODERATE | HAZY | 0 | 0 | 0 | 0 | 0 | 0 | 0 | a trivial correction was made in this observation | 29985 | |||
| 1750-08-01T13:00 | 15.75 | -18.39 | 127 | GRAND SALVAGE | N10E | 291 | SBE | 38.00 | -8 | VARIABLE, SE | LITTLE WIND, SOMETIMES CALM, AT 5AM SUDDEN SQUALL TO THE SE | HEAVY SHOWERS OF RAIN | HAZY | 1 | 1 | 0 | 0 | 0 | 0 | 0 | a trivial correction was made in this observation | 29986 | |||
| 1750-08-02T13:00 | 15.57 | -18.31 | 362 | 2.6 | GRAND SALVAGE | N10E | 295 | SE1/4E | 12.00 | -8 | VARIABLE | LIGHT BREEZE WITH CALMS | HOT SULTRY WEATHER | 0 | 0 | 0 | 0 | 1 | 0 | 0 | a trivial correction was made in this observation | 29987 | |||
| 1750-08-03T13:00 | 14.55 | -18.70 | 362 | 2.6 | CAPE DE VERDE | SE | 3 | SE1/4E | -8 | VARIABLE | LIGHT BREEZE WITH CALMS - AT 5PM SUDDEN VERY HARD SQUALL | AT 5PM RAIN | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 29988 | |||||
| 1750-08-04T13:00 | 14.47 | -18.03 | 362 | 6.7 | CAPE DE VERDE | E | 10 | W | 31.00 | -8 | VARIABLE | MODERATE, SOMETIMES CALM | HAZY | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 29989 | ||||
| 1750-08-05T00:00 | 362 | CAPE DE VERDE | SBW1/2W | 5 | VARIABLE | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 29990 |