Bokhorst, Stef; Huiskes, Ad H L; Convey, Peter; Sinclair, Brent J; Lebouvier, Marc; Van de Vijver, Bart; Wall, Diana H (2011): (Table 4) Annual date of soil thaw, soil surface degree day sums and the number of freeze-thaw events in Antarctic warming studies [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.807800, In supplement to: Bokhorst, S et al. (2011): Microclimate impacts of passive warming methods in Antarctica: implications for climate change studies. Polar Biology, 34(10), 1421-1435, https://doi.org/10.1007/s00300-011-0997-y
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Coverage:
Median Latitude: -67.832386 * Median Longitude: -100.029529 * South-bound Latitude: -77.633000 * West-bound Longitude: 162.883000 * North-bound Latitude: -52.200000 * East-bound Longitude: -45.630000
Date/Time Start: 2003-11-01T00:00:00 * Date/Time End: 2006-02-28T00:00:00
Minimum DEPTH, sediment/rock: 0 m * Maximum DEPTH, sediment/rock: 0 m
Event(s):
Alexander_Is (Mars Oasis) * Latitude: -71.867000 * Longitude: -68.283000 * Location: Antarctica * Method/Device: Biology (BIO)
Comment:
Annual degree day sums above 0°C calculated from daily averages obtained from hourly logging of soil surface temperature at every location. Freeze-thaw events calculated from hourly data obtained from temperature sensors at the soil surface. % indicate the percentage difference between chambers and control plots. Soil thaw date (day of the year) at which soil surface temperatures reach above freezing temperatures in and outside passive warming chambers for at least three consecutive days in spring. Note that soils at the Falkland Islands did not freeze for prolonged periods during winter.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Bokhorst, Stef | |||
| 2 | Latitude of event | Latitude | Bokhorst, Stef | |||
| 3 | Longitude of event | Longitude | Bokhorst, Stef | |||
| 4 | Treatment | Treat | Bokhorst, Stef | |||
| 5 | Area/locality | Area | Bokhorst, Stef | |||
| 6 | DEPTH, sediment/rock | Depth sed | m | Bokhorst, Stef | Geocode | |
| 7 | Days, cumulated | Days cum | day | Bokhorst, Stef | soil surface >0°C, control | |
| 8 | Days, cumulated | Days cum | day | Bokhorst, Stef | Incubation of surface soil/sediment, in-situ | soil surface >0°C, chamber |
| 9 | Percentage | Perc | % | Bokhorst, Stef | days >0°C, % of control | |
| 10 | Cycles | Cycles | # | Bokhorst, Stef | free-thaw, control | |
| 11 | Cycles | Cycles | # | Bokhorst, Stef | Incubation of surface soil/sediment, in-situ | free-thaw, chamber |
| 12 | Percentage | Perc | % | Bokhorst, Stef | freeze-thaw, % of control | |
| 13 | Day of the year | DOY | day | Bokhorst, Stef | of soil thaw, control | |
| 14 | Day of the year | DOY | day | Bokhorst, Stef | Incubation of surface soil/sediment, in-situ | of soil thaw, chamber |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
98 data points
Data
| 1 Event | 2 Latitude | 3 Longitude | 4 Treat | 5 Area | 6 Depth sed [m] | 7 Days cum [day] (soil surface >0°C, control) | 8 Days cum [day] (soil surface >0°C, chamber) | 9 Perc [%] (days >0°C, % of control) | 10 Cycles [#] (free-thaw, control) | 11 Cycles [#] (free-thaw, chamber) | 12 Perc [%] (freeze-thaw, % of control) | 13 DOY [day] (of soil thaw, control) | 14 DOY [day] (of soil thaw, chamber) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Signy_Is | -60.7100 | -45.6300 | Closed | Signy Island | 0 | 96 | 335 | 249 | 53 | 43 | -19 | 277 | 280 |
| Signy_Is | -60.7100 | -45.6300 | TC | Signy Island | 0 | 296 | 376 | 27 | 174 | 145 | -17 | 289 | 301 |
| Leonie_Is | -67.6000 | -68.3500 | Closed | Leonie Island | 0 | 521 | 1017 | 95 | 126 | 148 | 17 | 309 | 281 |
| Leonie_Is | -67.6000 | -68.3500 | Ventilated | Leonie Island | 0 | 521 | 613 | 18 | 126 | 124 | -2 | 309 | 309 |
| Alexander_Is | -71.8670 | -68.2830 | Closed | Mars Oasis | 0 | 196 | 641 | 227 | 29 | 25 | -14 | 333 | 325 |
| Alexander_Is | -71.8670 | -68.2830 | Ventilated | Mars Oasis | 0 | 441 | 846 | 92 | 29 | 55 | 90 | 333 | 326 |
| Ross_Is | -77.2167 | 166.4333 | Closed | Ross Island | 0 | 148 | 299 | 102 | 67 | 34 | -49 | 335 | 338 |
| Falkland_Is | -52.2000 | -59.0600 | TC | Falkland Islands | 0 | 2755 | 3089 | 12 | 56 | 57 | 2 | ||
| Anchorage_Is | -67.6000 | -68.2000 | TC | Anchorage Island | 0 | 357 | 411 | 15 | 99 | 73 | -26 | 301 | 314 |
| Dry_valley | -77.6330 | 162.8830 | TC | Dry Valleys | 0 | 399 | 560 | 40 | 106 | 50 | -53 | 319 | 319 |