Definition: | A unique number assigned to each sample collected at a specific site at a specific date and time. The year that the sample was collected is followed by a dash and then a sequential number. For example, if 600 samples were collected in 2002, then the first sample collected is 2002-0001 and the last sample is 2002-0600. | Site Name. If a soil site, the site is described in the name by general location then specific feature (e.g., watertrack) then specific sampling point (1,2,3,...). Lake and stream sites use common names (e.g., Toolik) or LTER number codes. Exceptions in naming procedure are provided in the Code Information and in the AK-LTER_Site_Info.xls file. | Sampling Date | Sampling Time in Alaska Daylight Savings Time (1 hour ahead of Alaska Standard Time: if 13:00 DST than 12:00 AST) | Depth from surface of lake, stream, or soil, or a description of location such as "meta" for metalimnion. | Distance along a stream where negative values are upstream of a designated starting point and positive values are downstream of the designated starting point. For soil sites, the distance is the perpendicular distance from the river or lake shore. Can include a text description. | Elevation above sea level | Sample water temperature, deg C | Electrical conductivity of the water sample | pH (opposite of the log of the molar hydrogen ion concentration) | Total alkalinity (carbonate and non-carbonate alkalinity) | Partial pressure of carbon dioxide | Partial pressure of methane gas | Dissolved carbon dioxide gas concentration | Dissolved methane gas concentration | Dissolved organic carbon | Ammonium by the OPA method | Phosphate (Soluble Reactive Phosphorus) | Nitrate | Total dissolved nitrogen | Total dissolved phosphorus | Particulate carbon | Particulate nitrogen | Particulate phosphorus | Calcium | Magnesium | Sodium | Potassium | Sulfate | Chloride |
Measurement Values Domain: | Definition | A unique number assigned to each sample collected at a specific site at a specific date and time. The year that the sample was collected is followed by a dash and then a sequential number. For example, if 600 samples were collected in 2002, then the first sample collected is 2002-0001 and the last sample is 2002-0600. |
| Definition | Site Name. If a soil site, the site is described in the name by general location then specific feature (e.g., watertrack) then specific sampling point (1,2,3,...). Lake and stream sites use common names (e.g., Toolik) or LTER number codes. Exceptions in naming procedure are provided in the Code Information and in the AK-LTER_Site_Info.xls file. |
| Format | YYYY-MM-DD | Precision | |
| | Definition | Depth from surface of lake, stream, or soil, or a description of location such as "meta" for metalimnion. |
| Definition | Distance along a stream where negative values are upstream of a designated starting point and positive values are downstream of the designated starting point. For soil sites, the distance is the perpendicular distance from the river or lake shore. Can include a text description. |
| Unit | meter | Type | real | Min | 719 | Max | 884 |
| Unit | celsius | Type | real | Min | 0.0 | Max | 21.7 |
| Unit | microsiemenPerCentimeter | Type | real | Min | 3.7 | Max | 29.4 |
| Unit | number | Type | real | Min | 3.60 | Max | 6.92 |
| Unit | microequivalentPerLiter | Type | real | Min | 0 | Max | 108 |
| Unit | microatmosphere | Type | real | Min | 521 | Max | 9504 |
| Unit | microatmosphere | Type | real | Min | 4 | Max | 17400 |
| Unit | micromolePerLiter | Type | real | Min | 40 | Max | 360 |
| Unit | micromolePerLiter | Type | real | Min | 0.08 | Max | 35.20 |
| Unit | micromolePerLiter | Type | real | Min | 423 | Max | 3500 |
| Unit | micromolePerLiter | Type | real | Min | 0.01 | Max | 9.49 |
| Unit | micromolePerLiter | Type | real | Min | 0.00 | Max | 0.39 |
| Unit | micromolePerLiter | Type | real | Min | 0.00 | Max | 4.13 |
| Unit | micromolePerLiter | Type | real | Min | 12.0 | Max | 79.2 |
| Unit | micromolePerLiter | Type | real | Min | 0.01 | Max | 1.82 |
| Unit | microgramPerLiter | Type | real | Min | 7 | Max | 8695 |
| Unit | microgramPerLiter | Type | real | Min | 4.2 | Max | 1399.0 |
| Unit | micromolePerLiter | Type | real | Min | 0.0 | Max | 1.7 |
| Unit | micromolePerLiter | Type | real | Min | 0.3 | Max | 83.4 |
| Unit | micromolePerLiter | Type | real | Min | 0.1 | Max | 51.7 |
| Unit | micromolePerLiter | Type | real | Min | 0.0 | Max | 67.6 |
| Unit | micromolePerLiter | Type | real | Min | 0.0 | Max | 60.9 |
| Unit | micromolePerLiter | Type | real | Min | 0.1 | Max | 14.5 |
| Unit | micromolePerLiter | Type | real | Min | 0.0 | Max | 65.9 |
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