Arason, Pordur; Petersen, G N; Bjornsson, H (2011): Statistics of radar altitude estimates of plume-top over time intervals of 24 hours [dataset]. Icelandic Meteorological Office, Reykjavik, PANGAEA, https://doi.org/10.1594/PANGAEA.760689, In supplement to: Arason, P et al. (2011): Observations of the altitude of the volcanic plume during the eruption of Eyjafjallajökull, April–May 2010. Earth System Science Data, 3(1), 9-17, https://doi.org/10.5194/essd-3-9-2011
Always quote citation above when using data! You can download the citation in several formats below.
Coverage:
Latitude: 63.630000 * Longitude: -19.620000
Date/Time Start: 2010-04-15T00:00:00 * Date/Time End: 2010-05-24T00:00:00
Event(s):
Eyjafjallajökull * Latitude: 63.630000 * Longitude: -19.620000 * Date/Time Start: 2010-04-14T00:00:00 * Date/Time End: 2010-05-24T00:00:00 * Location: Iceland * Method/Device: Observation (OBSE)
Comment:
Radar did not detect plume when below about 2.9 km due to mountain ranges and curvature of the Earth.
Date/time (UTC) refer to the end of the time interval.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Geocode | |||
| 2 | Number of scans | Scans | # | Arason, Pordur | Radar | with clearly defined plume height |
| 3 | Number of scans | Scans | # | Arason, Pordur | Radar | where plume is clearly under minimum detection height |
| 4 | Number of scans | Scans | # | Arason, Pordur | Radar | where plume is obscured by precipitating clouds |
| 5 | Number of scans | Scans | # | Arason, Pordur | Radar | missing in 5 min |
| 6 | Number of values averaged at time interval | N | # | Arason, Pordur | Calculated | |
| 7 | Altitude, minimum | Alt min | km | Arason, Pordur | plume-top | |
| 8 | Mean, statistical | Mean | Arason, Pordur | - one standard deviation | ||
| 9 | Mean, statistical | Mean | Arason, Pordur | plume-top altitude | ||
| 10 | Mean, statistical | Mean | Arason, Pordur | + one standard deviatio | ||
| 11 | Altitude, maximum | Alt max | km | Arason, Pordur | plume-top | |
| 12 | Standard deviation | Std dev | ± | Arason, Pordur | of the plume-top altitude | |
| 13 | Quartile 25 | Q25 | Arason, Pordur | of plume-top altitude, 25% of the measurements are below this value | ||
| 14 | Median, statistical | Median | Arason, Pordur | of plume-top altitude | ||
| 15 | Quartile 75 | Q75 | Arason, Pordur | of plume-top altitude |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
560 data points
Data
| 1 Date/Time | 2 Scans [#] (with clearly defined plume he...) | 3 Scans [#] (where plume is clearly under ...) | 4 Scans [#] (where plume is obscured by pr...) | 5 Scans [#] (missing in 5 min, Radar) | 6 N [#] (Calculated) | 7 Alt min [km] (plume-top) | 8 Mean (- one standard deviation) | 9 Mean (plume-top altitude) | 10 Mean (+ one standard deviatio) | 11 Alt max [km] (plume-top) | 12 Std dev [±] (of the plume-top altitude) | 13 Q25 (of plume-top altitude, 25% of...) | 14 Median (of plume-top altitude) | 15 Q75 (of plume-top altitude) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2010-04-15 | 169 | 101 | 0 | 18 | 270 | 2.5 | 2.8 | 5.2 | 7.6 | 9.4 | 2.4 | 2.5 | 5.4 | 6.5 |
| 2010-04-16 | 120 | 14 | 54 | 100 | 134 | 2.5 | 4.1 | 5.1 | 6.1 | 6.1 | 1.0 | 5.2 | 5.4 | 5.7 |
| 2010-04-17 | 224 | 36 | 25 | 3 | 260 | 2.5 | 3.7 | 5.1 | 6.5 | 8.7 | 1.4 | 4.2 | 5.4 | 5.7 |
| 2010-04-18 | 238 | 0 | 0 | 50 | 238 | 4.9 | 4.7 | 5.9 | 7.2 | 8.5 | 1.3 | 5.1 | 5.2 | 7.9 |
| 2010-04-19 | 106 | 97 | 0 | 85 | 203 | 2.5 | 2.3 | 3.6 | 4.8 | 8.5 | 1.2 | 2.5 | 2.9 | 5.0 |
| 2010-04-20 | 15 | 254 | 19 | 0 | 269 | 2.5 | 2.2 | 2.6 | 3.0 | 5.1 | 0.4 | 2.5 | 2.5 | 2.5 |
| 2010-04-21 | 25 | 261 | 0 | 2 | 286 | 2.5 | 2.2 | 2.6 | 3.0 | 4.2 | 0.4 | 2.5 | 2.5 | 2.5 |
| 2010-04-22 | 20 | 268 | 0 | 0 | 288 | 2.5 | 2.3 | 2.6 | 2.9 | 4.9 | 0.3 | 2.5 | 2.5 | 2.5 |
| 2010-04-23 | 106 | 182 | 0 | 0 | 288 | 2.5 | 2.3 | 2.9 | 3.5 | 4.9 | 0.6 | 2.5 | 2.5 | 3.8 |
| 2010-04-24 | 48 | 240 | 0 | 0 | 288 | 2.5 | 2.2 | 2.7 | 3.1 | 5.1 | 0.4 | 2.5 | 2.5 | 2.5 |
| 2010-04-25 | 111 | 176 | 1 | 0 | 287 | 2.5 | 2.3 | 2.9 | 3.5 | 5.1 | 0.6 | 2.5 | 2.5 | 3.8 |
| 2010-04-26 | 47 | 2 | 239 | 0 | 49 | 2.5 | 4.0 | 4.8 | 5.7 | 5.6 | 0.8 | 4.9 | 5.1 | 5.3 |
| 2010-04-27 | 226 | 17 | 7 | 38 | 243 | 2.5 | 3.6 | 4.3 | 5.1 | 5.5 | 0.8 | 3.8 | 4.3 | 4.9 |
| 2010-04-28 | 74 | 76 | 138 | 0 | 150 | 2.5 | 2.4 | 3.0 | 3.7 | 4.3 | 0.6 | 2.5 | 2.5 | 3.7 |
| 2010-04-29 | 91 | 4 | 181 | 12 | 95 | 2.5 | 4.0 | 4.9 | 5.8 | 8.0 | 0.9 | 4.9 | 5.0 | 5.0 |
| 2010-04-30 | 56 | 90 | 77 | 65 | 146 | 2.5 | 2.2 | 3.2 | 4.3 | 8.0 | 1.0 | 2.5 | 2.5 | 3.9 |
| 2010-05-01 | 6 | 210 | 0 | 72 | 216 | 2.5 | 2.4 | 2.5 | 2.7 | 3.9 | 0.1 | 2.5 | 2.5 | 2.5 |
| 2010-05-02 | 1 | 178 | 0 | 109 | 179 | 2.5 | 2.3 | 2.5 | 2.7 | 5.1 | 0.2 | 2.5 | 2.5 | 2.5 |
| 2010-05-03 | 7 | 229 | 0 | 52 | 236 | 2.5 | 2.3 | 2.5 | 2.7 | 3.9 | 0.2 | 2.5 | 2.5 | 2.5 |
| 2010-05-04 | 57 | 92 | 91 | 48 | 149 | 2.5 | 2.2 | 3.4 | 4.6 | 5.5 | 1.2 | 2.5 | 2.5 | 5.1 |
| 2010-05-05 | 106 | 28 | 11 | 143 | 134 | 2.5 | 3.4 | 4.6 | 5.9 | 7.1 | 1.3 | 3.9 | 5.3 | 5.4 |
| 2010-05-06 | 240 | 0 | 0 | 48 | 240 | 4.2 | 4.9 | 5.8 | 6.8 | 10.0 | 0.9 | 5.4 | 5.5 | 6.0 |
| 2010-05-07 | 240 | 0 | 0 | 48 | 240 | 5.0 | 5.0 | 5.3 | 5.5 | 6.6 | 0.2 | 5.1 | 5.2 | 5.3 |
| 2010-05-08 | 240 | 0 | 0 | 48 | 240 | 4.0 | 5.0 | 5.2 | 5.4 | 5.5 | 0.2 | 5.1 | 5.2 | 5.3 |
| 2010-05-09 | 216 | 24 | 0 | 48 | 240 | 2.5 | 3.8 | 4.6 | 5.5 | 5.7 | 0.9 | 4.2 | 5.0 | 5.1 |
| 2010-05-10 | 233 | 7 | 0 | 48 | 240 | 2.5 | 3.6 | 4.3 | 5.1 | 5.3 | 0.7 | 3.9 | 4.1 | 5.0 |
| 2010-05-11 | 221 | 19 | 0 | 48 | 240 | 2.5 | 3.5 | 4.3 | 5.1 | 5.5 | 0.8 | 3.9 | 5.0 | 5.0 |
| 2010-05-12 | 113 | 54 | 69 | 52 | 167 | 2.5 | 2.8 | 3.9 | 5.0 | 7.9 | 1.1 | 2.5 | 3.9 | 5.0 |
| 2010-05-13 | 156 | 6 | 77 | 49 | 162 | 2.5 | 3.9 | 4.6 | 5.3 | 5.3 | 0.7 | 4.1 | 5.0 | 5.2 |
| 2010-05-14 | 240 | 0 | 0 | 48 | 240 | 4.2 | 4.7 | 5.9 | 7.2 | 8.2 | 1.3 | 5.1 | 5.2 | 7.9 |
| 2010-05-15 | 240 | 0 | 0 | 48 | 240 | 4.0 | 4.5 | 5.8 | 7.1 | 7.9 | 1.3 | 5.0 | 5.0 | 7.9 |
| 2010-05-16 | 239 | 0 | 0 | 49 | 239 | 4.8 | 4.6 | 5.4 | 6.2 | 8.1 | 0.8 | 4.9 | 5.0 | 5.6 |
| 2010-05-17 | 240 | 0 | 0 | 48 | 240 | 5.1 | 5.4 | 6.7 | 7.9 | 8.1 | 1.2 | 5.5 | 5.7 | 7.9 |
| 2010-05-18 | 240 | 0 | 0 | 48 | 240 | 3.9 | 4.7 | 5.9 | 7.2 | 7.9 | 1.2 | 5.1 | 5.3 | 7.9 |
| 2010-05-19 | 126 | 2 | 112 | 48 | 128 | 2.5 | 4.1 | 4.8 | 5.6 | 6.0 | 0.7 | 3.9 | 5.0 | 5.2 |
| 2010-05-20 | 132 | 56 | 52 | 48 | 188 | 2.5 | 2.7 | 3.8 | 4.8 | 5.9 | 1.0 | 2.5 | 3.9 | 4.8 |
| 2010-05-21 | 119 | 22 | 99 | 48 | 141 | 2.5 | 3.0 | 3.8 | 4.5 | 5.2 | 0.7 | 3.8 | 3.8 | 3.9 |
| 2010-05-22 | 51 | 175 | 0 | 62 | 226 | 2.5 | 2.2 | 2.8 | 3.3 | 5.0 | 0.6 | 2.5 | 2.5 | 2.5 |
| 2010-05-23 | 0 | 94 | 0 | 194 | 94 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 0.0 | 2.5 | 2.5 | 2.5 |
| 2010-05-24 | 0 | 95 | 0 | 192 | 95 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 0.0 | 2.5 | 2.5 | 2.5 |