Christman Field Latest Observations
Date Time
MST
Temp
°F
RH
%
DewPt
°F
Wind
mph
Dir
°
Gust
mph
Dir
°
Press
in Hg
Solar
W/m^2
Prec
in
2020-01-25 01:05 30.6 73.6 23.1 3.6 330 5.4 30 24.759 0.1 0.00
2020-01-25 01:00 31.0 70.5 22.5 3.5 256 4.4 256 24.755 0.0 0.00
2020-01-25 00:55 31.3 68.9 22.3 4.1 248 5.2 252 24.757 0.0 0.00
2020-01-25 00:50 30.2 71.0 21.9 0.2 254 2.0 254 24.759 0.0 0.00
2020-01-25 00:45 30.5 71.1 22.2 0.2 241 1.9 241 24.759 0.0 0.00
2020-01-25 00:40 30.6 71.3 22.4 2.5 241 3.1 255 24.759 0.1 0.00
2020-01-25 00:35 30.3 72.1 22.4 2.2 256 2.9 256 24.762 0.1 0.00
2020-01-25 00:30 29.7 73.5 22.3 1.9 256 2.7 256 24.765 0.1 0.00
2020-01-25 00:25 29.8 72.5 22.0 0.0 259 0.0 259 24.766 0.1 0.00
2020-01-25 00:20 29.3 73.0 21.7 0.1 259 1.3 259 24.766 0.1 0.00
2020-01-25 00:15 29.4 74.6 22.3 1.2 259 2.1 259 24.766 0.1 0.00
2020-01-25 00:10 29.2 76.2 22.7 1.4 256 2.8 256 24.770 0.1 0.00
2020-01-25 00:05 29.1 76.7 22.7 0.8 310 1.5 310 24.772 0.1 0.00
2020-01-25 00:00 28.8 76.7 22.4 1.3 310 2.2 338 24.773 0.0 0.00
2020-01-24 23:55 28.8 73.8 21.5 2.7 338 3.2 334 24.773 0.1 0.00
2020-01-24 23:50 28.9 74.2 21.7 1.0 334 4.6 315 24.773 0.1 0.00
2020-01-24 23:45 29.3 73.2 21.8 0.8 30 3.1 30 24.773 0.1 0.00
2020-01-24 23:40 30.0 72.3 22.2 4.3 26 5.3 36 24.773 0.1 0.00
2020-01-24 23:35 30.5 71.0 22.2 0.3 7 2.5 7 24.773 0.1 0.00
2020-01-24 23:30 30.4 71.7 22.4 0.0 7 0.0 7 24.773 0.0 0.00
2020-01-24 23:25 31.2 71.1 23.0 0.8 7 2.6 261 24.775 0.0 0.00
2020-01-24 23:20 32.0 67.1 22.3 1.8 261 2.7 261 24.776 0.0 0.00
2020-01-24 23:15 30.9 69.8 22.2 1.6 261 2.5 261 24.776 0.1 0.00
2020-01-24 23:10 30.0 73.2 22.5 1.7 261 3.0 261 24.776 0.1 0.00
2020-01-24 23:05 30.0 72.5 22.2 3.6 261 4.6 261 24.776 0.1 0.00
2020-01-24 23:00 30.4 73.0 22.8 3.6 261 5.0 274 24.777 0.1 0.00
2020-01-24 22:55 31.5 68.6 22.3 1.9 335 4.6 15 24.780 0.0 0.00
2020-01-24 22:50 31.7 68.3 22.5 3.6 15 6.0 23 24.780 0.0 0.00
2020-01-24 22:45 33.0 66.0 22.9 0.0 9 1.5 9 24.777 0.1 0.00
2020-01-24 22:40 32.7 65.8 22.5 0.0 269 0.0 269 24.776 0.0 0.00
CIRA

Cooperative Institute for Research in the Atmosphere

Prenni, Tony

Tony Prenni

Job Title:
Physical Chemist
Phone Number:

970-491-8414

Fax Number:

970-491-8241

Office Location:
CIRA Room 102A2
    Publications

    Use of Cameras for Monitoring Visibility Impairment

    Published Date: 2018
    Published By: Atmospheric Environment

    Comparative Measurements of Ambient Atmospheric Concentrations of Ice Nucleating Particles using Multiple Immersion Freezing Methods and a Continuous Flow Diffusion Chamber

    Published Date: 2017
    Published By: Atmospheric Chemistry and Physics

    The Recent History of the Composition of Fine Particulate Matter in the Rural United States

    Published Date: 2018
    Published By: Conference

    What Visibility Metrics Best Represent Individuals’ Judgments of Visual Air Quality?

    Published Date: 2018
    Published By: Conference

    The Recent History of the Composition of Fine Particulate Matter in the Rural United States

    Published Date: 2017
    Published By: Conference

    Characteristics of atmospheric ice nucleating particles associated with biomass burning in the US: Prescribed burns and wildfires

    Published Date: 2014
    Published By: Journal of Geophysical Research
    An improved understanding of atmospheric ice nucleating particles (INP), including sources and atmospheric abundance, is needed to advance our understanding of aerosol-cloud-climate interactions. This study examines diverse biomass burning events to better constrain our understanding of how fires impact populations of INP. Sampling of prescribed burns and wildfires in Colorado and Georgia, U.S.A., revealed that biomass burning leads to the release of particles that are active as condensation/immersion freezing INP at temperatures from −32 to −12°C. During prescribed burning of wiregrass, up to 64% of INP collected during smoke-impacted periods were identified as soot particles via electron microscopy analyses. Other carbonaceous types and mineral-like particles dominated INP collected during wildfires of ponderosa pine forest in Colorado. Total measured nINP and the excess nINP associated with smoke-impacted periods were higher during two wildfires compared to the prescribed burns. Interferences from non-smoke sources of INP, including long-range transported mineral dust and local contributions of soils and plant materials lofted from the wildfires themselves, presented challenges in using the observations to develop a smoke-specific nINP parameterization. Nevertheless, these field observations suggest that biomass burning may serve as an important source of INP on a regional scale, particularly during time periods that lack other robust sources of INP such as long-range transported mineral dust.