3b2b24ff-4916-4d92-95b7-c6b2fcefd381 Scenarios Network for Alaska and Arctic Planning uaf-snap-data-tools@alaska.edu 2024-11-01T14:08:20 ISO 19115:2003/19139 1.0 2 1186 2 3218 2 EPSG:3338 Historical Monthly and Derived Temperature Products Downscaled from CRU TS data via the delta method - 2 km 2022-03-04 This dataset includes downscaled historical estimates of monthly average, minimum, and maximum temperature and derived annual, seasonal, and decadal means of monthly average temperature (in degrees Celsius, no unit conversion necessary) from 1901 to 2006 (CRU TS 3.0), 2009 (CRU TS 3.1), 2015 (CRU TS 4.0), 2020 (CRU TS 4.05), or 2023 (CRU TS 4.08) at 2km x 2km spatial resolution. CRU TS 4.0 is only available as monthly averages, minimum, and maximum files. CRU TS 4.05 and 4.08 are only available as monthly averages. The downscaling process utilizes PRISM climatological datasets from 1961-1990. Matthew Leonawicz Michael Lindgren Tom Kurkowski Scott Rupp John Walsh Scenarios Network for Alaska and Arctic Planning uaf-snap-data-tools@alaska.edu https://catalog.snap.uaf.edu/geonetwork/srv/api/records/3b2b24ff-4916-4d92-95b7-c6b2fcefd381/attachments/tas_preview_cru.png historical temperature https://creativecommons.org/licenses/by/4.0/ 2 eng climatologyMeteorologyAtmosphere 1901-01-15 2020-12-15 -204.9237 -81.9968 36.2325 72.9766 This ISO record intends to serve as the official metadata for a somewhat heterogenous dataset. The dataset is heterogenous in the sense that data exist for multiple versions of the base data (CRU TS observation / interpolated data), and there is some inconsistency in the types of derived summaries present for across the versions. E.g., annual, seasonal, and decadal means of monthly averages are available for some versions and not others. The rest of this section provides information for working with these data: File naming scheme: Files are named according to the following pattern: <variable>_<aggregation type>_<units>_<CRU TS version>_historical_<month>_<year>.tif * <variable> is `tas`, corresponding to near-surface air temperature * <aggregation type> is `mean`, how the data is aggregated over time * <units> is `C` for Celsius, as these data represent temperatures measured in degrees Celsius * <CRU TS version> will vary depending on download chosen * <month> will be the two-numbered code ranging from 01 (Jan) to 12 (Dec) * <year> will correspond to the year of the observations For seasonal means, the four seasons are referred to by the first letter of 3 months making up that season: * `JJA`: summer (June, July, August) * `SON`: fall (September, October, November) * `DJF`: winter (December, January, February) * `MAM`: spring (March, April, May) GeoTIFF 1.0 http://data.snap.uaf.edu/data/Base/AK_CAN_2km/historical/CRU_TS/Historical_Monthly_and_Derived_Temperature_Products_2km_CRU_TS/ WWW:LINK-1.0-http--link URL to web-accessible folder containing dataset SNAP downscaled data products are value added products that build off of other datasets that have been accepted by the scientific community as some of the highest quality climate data available. Please see https://uaf-snap.org/ to explore how our data is produced.