Uptake ofHNO₃ onto cirrus ice may play an important role in tropospheric NOx cycling. Discrepancies between modeled and in situ measurements of gas‐phase HNO₃ in the troposphere suggest that redistribution and removal mechanisms by cirrus ice have been poorly constrained. Limited in situ measurements have provided somewhat differing results and...
Measurements of ice water content (IWC) and
mean ice-crystal size and concentration made by two in-situ
probes, C, VI and PVM, were compared on the DC-8 aircraft
during SUCCESS flights in orographic ice clouds. The
comparison of 1WC in these wave clouds, that formed at
temperatures of about -38 °C...
A temperature spectrum if heterogeneous freezing nuclei concentrations in continental air in the upper troposphere was determined based on airborne measurements. Numerical model simulations incorporating ice formation by heterogeneous and homogeneous freezing of deliquesced soluble aerosol particles were performed to investigate the effect of the heterogeneous freezing nuclei were predicted...
A continuous flow diffusion chamber (CFDC) was used to measure ice formation by
cloud particle residuals during the Cirrus Regional Study of Tropical Anvils and Cirrus
Layers-Florida Area Cirrus Experiment. These measurements were directed toward
determining the relative contributions of homogeneous nucleation, heterogeneous
nucleation, and secondary ice formation processes to...
During the Ice in Clouds Experiment‐Layer Clouds (ICE‐L), dry lakebed, or playa,
salts from the Great Basin region of the United States were observed as cloud nuclei in
orographic wave clouds over Wyoming. Using a counterflow virtual impactor in series with
a single‐particle mass spectrometer, sodium‐potassium‐magnesium‐calcium‐chloride
salts were identified as...
We describe an upper-division experiment in thermal physics where students measure the tension
of a rubber band as a function of temperature and length, and use a Maxwell relation to find the
change in internal energy and entropy for an isothermal stretch. This allows students to experimentally check the predictions...
The primary objective of the study was to develop the methodology to identify broad silvicultural treatment opportunities for nonindustrial private (NIP) timberland in western Montana using Forest Survey data. The study assumes a management goal of maximum volume production at the stand level. The purpose of the stand treatments is...
This report describes the 1970 economy of Douglas County, Oregon. An input-output model is presented and used to detail the interrelationships of the various sectors. An analytical framework is presented that permits an appraisal of the direction and magnitude of change in the county economy that would result from changes...
Cyanobacteria inhabit nearly every ecosystem on earth, play a vital role in nutrient cycling, and are
useful as model organisms for fundamental research in photosynthesis and carbon and nitrogen fixation.
In addition, they are important for several established biotechnologies for producing food additives,
nutritional and pharmaceutical compounds, and pigments, as...