Methane Isotope Instrument Validation and Source Identification at Four Corners, New Mexico, United States

2016 ◽  
Vol 120 (9) ◽  
pp. 1488-1494 ◽  
Author(s):  
Caleb Arata ◽  
Thom Rahn ◽  
Manvendra K. Dubey
Keyword(s):  
United States ◽  
New Mexico ◽  
Source Identification ◽  
Instrument Validation ◽  
Four Corners

scholarly journals Effects of model resolution on the interpretation of satellite NO<sub>2</sub> observations

2011 ◽  
Vol 11 (22) ◽  
pp. 11647-11655 ◽  
Author(s):  
L. C. Valin ◽  
A. R. Russell ◽  
R. C. Hudman ◽  
R. C. Cohen
Keyword(s):  
New Mexico ◽  
Los Angeles ◽  
Power Plants ◽  
Loss Rate ◽  
Nonlinear Effects ◽  
Model Resolution ◽  
Transport Models ◽  
Chemical Transport Models ◽  
Four Corners ◽  
Tropospheric No2

Abstract. Inference of NOx emissions (NO+NO2) from satellite observations of tropospheric NO2 column requires knowledge of NOx lifetime, usually provided by chemical transport models (CTMs). However, it is known that species subject to non-linear sources or sinks, such as ozone, are susceptible to biases in coarse-resolution CTMs. Here we compute the resolution-dependent bias in predicted NO2 column, a quantity relevant to the interpretation of space-based observations. We use 1-D and 2-D models to illustrate the mechanisms responsible for these biases over a range of NO2 concentrations and model resolutions. We find that predicted biases are largest at coarsest model resolutions with negative biases predicted over large sources and positive biases predicted over small sources. As an example, we use WRF-CHEM to illustrate the resolution necessary to predict 10 AM and 1 PM NO2 column to 10 and 25% accuracy over three large sources, the Four Corners power plants in NW New Mexico, Los Angeles, and the San Joaquin Valley in California for a week-long simulation in July 2006. We find that resolution in the range of 4–12 km is sufficient to accurately model nonlinear effects in the NO2 loss rate.

Territorial and Early Statehood Periods

2017 ◽  
Author(s):  
Teresita Majewski ◽  
Lauren E. Jelinek
Keyword(s):  
United States ◽  
New Mexico ◽  
The United States ◽  
American Southwest ◽  
Subsequent Work ◽  
Cultural Heterogeneity ◽  
Terra Incognita ◽  
Formative Time ◽  
The 1960S ◽  
Historical Trajectory

The archaeology of the territorial and early statehood periods (1850–1917) in the American Southwest was virtually terra incognita until the advent of government-mandated archaeology in the 1960s. Subsequent work has shown that historical archaeology has much to contribute to a fuller understanding of this dynamic and formative time in U.S. history. Historical-archaeological investigations have demonstrated that although the United States formally exerted control over Arizona, Colorado, and New Mexico by the last half of the nineteenth century, the interactions among its Indigenous, Spanish, and Mexican inhabitants strongly influenced the territory’s historical trajectory into the nineteenth and early twentieth centuries. This chapter provides a historic context and a selective overview of archaeological studies that relate to the key themes of shifting economies and cultural heterogeneity.

Sign in / Sign up

Export Citation Format

Share Document