CJCZO -- GIS/Map Data -- EEMT -- Jemez River Basin -- (2010)

OVERVIEW

Description/Abstract

Yearly effective energy and mass transfer (EEMT) (MJ m−2 yr−1) was calculated for the Valles Calders, upper part of the Jemez River basin by summing the 12 monthly values. Effective energy and mass flux varies seasonally, especially in the desert southwestern United States where contemporary climate includes a bimodal precipitation distribution that concentrates in winter (rain or snow depending on elevation) and summer monsoon periods. This seasonality of EEMT flux into the upper soil surface can be estimated by calculating EEMT on a monthly basis as constrained by solar radiation (Rs), temperature (T), precipitation (PPT), and the vapor pressure deficit (VPD): EEMT = f(Rs,T,PPT,VPD). Here we used a multiple linear regression model to calculate the monthly EEMT that accounts for VPD, PPT, and locally modified T across the terrain surface. These EEMT calculations were made using data from the PRISM Climate Group at Oregon State University (www.prismclimate.org). Climate data are provided at an 800-m spatial resolution for input precipitation and minimum and maximum temperature normals and at a 4000-m spatial resolution for dew-point temperature (Daly et al., 2002). The PRISM climate data, however, do not account for localized variation in EEMT that results from smaller spatial scale changes in slope and aspect as occurs within catchments. To address this issue, these data were then combined with 10-m digital elevation maps to compute the effects of local slope and aspect on incoming solar radiation and hence locally modified temperature (Yang et al., 2007). Monthly average dew-point temperatures were computed using 10 yr of monthly data (2000–2009) and converted to vapor pressure. Precipitation, temperature, and dew-point data were resampled on a 10-m grid using spline interpolation. Monthly solar radiation data (direct and diffuse) were computed using ArcGIS Solar Analyst extension (ESRI, Redlands, CA) and 10-m elevation data (USGS National Elevation Dataset [NED] 1/3 Arc-Second downloaded from the National Map Seamless Server at seamless.usgs.gov). Locally modified temperature was used to compute the saturated vapor pressure, and the local VPD was estimated as the difference between the saturated and actual vapor pressures. The regression model was derived using the ISOHYS climate data set comprised of approximately 30-yr average monthly means for more than 300 weather stations spanning all latitudes and longitudes (IAEA).

Creator/Author

Rasmussen, Craig|Durcik, Matej

CZOs

Catalina-Jemez

Contact

Craig Rasmussen; Department of Soil, Water and Environmental Science; University of Arizona; crasmuss@cals.arizona.edu

Subtitle

Effective Energy and Mass Transfer for Valles Caldera

SUBJECTS

Disciplines

Biology / Ecology|GIS / Remote Sensing

Topics

GIS/Map Data

Subtopic

EEMT

Keywords

EEMT|Energy|Mass transfer|Valles Caldera|Jemez River|New Mexico

Variables

Effective Energy and Mass Transfer

Variables ODM2

Effective energy and mass transfer (EEMT)

TEMPORAL

Date Start

2010-01-01

Date End

2010-12-01

SPATIAL

Field Areas

Jemez River Basin

Location

Jemez River Basin

North latitude

36.024259

South latitude

35.778240999999994

West longitude

-106.680833

East longitude

-106.381759

REFERENCE

Citation

The following acknowledgment should accompany any publication or citation of these data - Logistical support and/or data were provided by the NSF-supported Jemez River Basin and Santa Catalina Mountains Critical Zone Observatory EAR-0724958.

Publications of this data

Chorover J., Troch P.A., Rasmussen C., Brooks P., Pelletier J., Breshears D.D., Huxman T., Lohse K., McIntosh J., Meixner T., Papuga S., Schaap M., Litvak M., Perdrial J. Harpold A., and Durcik M. (2011). How Water, Carbon, and Energy Drive Critical Zone Evolution: The Jemez-Santa Catalina Critical Zone Observatory . Vadose Zone Journal 10(3): 884-899 http://dx.doi.org/10.2136/vzj2010.0132

CZO ID

2560

Award Grant Numbers

National Science Foundation - EAR-0724958

COMMENTS

Comments

Detailed computation and data resources are described in the file EEMT_Radiation_Dew.pdf