Extreme Heat Events by County Metadata
- metadata
- idinfo
- citation
- citeinfo
- origin: New Mexico EPHTN Project Manager
- pubdate: 20170323
- title: Extreme Heat Events by County
- onlink
- description
- abstract: This dataset contains the number of days above various temperature thresholds for each year (1981-2016) and each New Mexico county. The dataset was created using guidelines provided in the CDC NCDM Recommendations for heat exposure. The NCDM documentation is available from CDC's Environmental Public Health Tracking Network. These county-level estimates were created using gridded climate data downloaded from the National Aeronautics and Space Administration's (NASA) North American Land Data Assimilation System (NLDAS-2) dataset. NLDAS-2 provides a gridded climate dataset that includes estimated hourly temperature and absolute humidity at 2 meters above ground level for the entire United States at 1/8th degree spatial resolution (approximately a 14x14 km grid). Using these data, we calculated both daily maximum temperature and daily maximum heat index for all New Mexico grid cells. Next, we identified extreme heat days using both absolute temperature thresholds (i.e. days when temperatures reached 90°F, 95°F, 100°F, or 105°F) and relative temperature thresholds (i.e. days when temperatures reached the local 90th, 95th, or 98th May-September 1981-2010 temperature percentiles). We converted grid-level data to county-level estimates to facilitate linkage with populations and health outcomes.
- purpose: This dataset contains calculated measures of cumulative annual heat exposure across NM by county. This does not provide complete information on actual exposure to dangerous temperatures in any given region or for any given person. These data are not intended for performing health assessments or otherwise being directly related or linked to health data.
- methods: These county-level estimates of heat exposure were created using gridded climate data downloaded from the National Aeronautics and Space Administration (NASA) North American Land Data Assimilation System (NLDAS-2) dataset. To do this, we first averaged the NLDAS-2 grid within each 2010 US Census tract in New Mexico. We then used 2010 Census tract populations to compute a population-weighted average temperature for each county, which was intended to be more representative of population exposure than a simple areal average would have been. Temperature and heat index percentiles were calculated using May-September temperatures from 1981-2010, though the number of days exceeding those percentiles in a given year were summed over all months. The NLDAS-2 forcing dataset provides absolute humidity and dry bulb temperature. Relative humidity was calculated from absolute humidity, dry bulb temperature, and elevation-adjusted atmospheric pressure after Bolton (1980) [The computation of equivalent potential temperature. Monthly Weather Review 108:1046-1053] and elevations for each NLDAS-2 grid cell. Heat index was then calculated using the NOAA standard heat index equation (http://www.wpc.ncep.noaa.gov/html/heatindex_equation.shtml), including all appropriate adjustments.
- timeperd
- timeinfo
- rngdates
- begdate: 19810101
- enddate: 20161231
- status
- progress: Complete
- update: Annually
- spdom
- bounding
- westbc: -109.05017700000001
- eastbc: -103.00206900000001
- northbc: 37.000292999999999
- southbc: 31.332173999999998
- keywords
- theme
- themekt: Exposure Type - CDC
- themekey: Temperature; Heat; Climate; Climate change; Environment
- place
- placekt: FIPS 6-4 (County)
- placekey: NM, New Mexico, 35
- accconst: None
- useconst: As general indicators of heat exposure over space and time, these indicators are not intended for use in performing health assessments or otherwise being directly linked (related) with health data. Data users should acknowledge the original data source (NASA NLDAS-2).
- ptcontac
- cntinfo
- cntperp
- cntper: New Mexico EPHTN Project Manager
- cntorg: New Mexico Department of Health, Environmental Health Epidemiology Bureau
- cntaddr
- addrtype: Physical
- address: 1190 St. Francis Drive
- city: Santa Fe
- state: NM
- postal: 87502
- country: United States Of America
- cntvoice: 18888788992
- cntvoice
- cnttdd
- cntfax: 5058270013
- cntemail: DOH-EHEB@state.nm.us
- hours: 8:00 - 5:00
- cntinst
- secinfo
- secsys: None
- secclass: Unclassified
- sechandl: None
- native: SAS
- dataqual
- logic: None
- complete
- lineage
- procstep
- procdesc: Calculate the indicators and measures.
- procdate: 20170323
- procstep
- procdesc: NM EPHT data queries through nmtracking.org (NMTracking) result in query-specific data sets that are aggregated by geographic unit. These aggregated data are dynamically joined to boundary data sets for display in the NMTracking interactive map. Boundaries are for County and 2010 U.S. Census Tract. Mapped results for the interactive data query include options for a background with an NM base map or shaded relief. The background map is served from © OpenStreetMap contributors (http://www.openstreetmap.org/copyright).
- procdate: 20170201
- eainfo
- overview
- eaover: NM EPHT heat exposure county indicators for temperature and heat index, 1981-2016.
- eadetcit: CDC Environmental Public Health Tracking Network, NCDM Recommendations, Temperature.
- distinfo
- distrib
- cntinfo
- cntperp
- cntper: New Mexico EPHTN Project Manager
- cntorg: New Mexico Department of Health, Environmental Health Epidemiology Bureau
- cntaddr
- addrtype: Physical
- address: 1190 St. Francis Drive
- city: Santa Fe
- state: NM
- postal: 87502
- country: United States Of America
- cntvoice: 18888788992
- cntvoice
- cnttdd
- cntfax: 5058270013
- cntemail: DOH-EHEB@state.nm.us
- hours: 8:00 - 5:00
- resdesc: Online Data
- distliab: Although these data have been processed successfully on a computer system at the New Mexico Department of Health (NMDOH), no warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is also strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate data set limitations, restrictions or intended use. The NMDOH shall not be held liable for improper or incorrect use of the data described and/or contained herein.
- custom: None
- metainfo
- metd: 20170201
- metc
- cntinfo
- cntperp
- cntper: New Mexico EPHTN Project Manager
- cntorg: New Mexico Department of Health, Environmental Health Epidemiology Bureau
- cntaddr
- addrtype: Physical
- address: 1190 St. Francis Drive
- city: Santa Fe
- state: NM
- postal: 87502
- country: United States Of America
- cntvoice: 18888788992
- cntfax: 5058270013
- cntemail: DOH-EHEB@state.nm.us
- hours: 8:00 - 5:00
- metstdn: EPHTN Tracking Network Profile Version 1.2
- metac: None
- metuc: None
