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Title: Climate Measurements and Modeling in the Arctic.


Abstract not provided.

Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Resource Relation:
Conference: Proposed for presentation at the Briefing for Larry Hinzman held May 19, 2017 in Albuquerque, NM.
Country of Publication:
United States

Citation Formats

Roesler, Erika Louise, and Hillman, Benjamin. Climate Measurements and Modeling in the Arctic.. United States: N. p., 2017. Web.
Roesler, Erika Louise, & Hillman, Benjamin. Climate Measurements and Modeling in the Arctic.. United States.
Roesler, Erika Louise, and Hillman, Benjamin. Mon . "Climate Measurements and Modeling in the Arctic.". United States. doi:.
title = {Climate Measurements and Modeling in the Arctic.},
author = {Roesler, Erika Louise and Hillman, Benjamin},
abstractNote = {Abstract not provided.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 2017},
month = {Mon May 01 00:00:00 EDT 2017}

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  • During the recent 3 month Arctic Ocean Expedition (AOE-96) to the North Pole during the summer of 1996 an enormous amount of data collected on the Arctic planetary boundary layer. In preparation for the expedition, the authors have developed an expanded and quite flexible 1-D computer code based on the successful work of ReVelle and of ReVelle and Coulter on modeling of boundary layer ``bursting``. This new code, BLMARC (Boundary Layer, Mixing, Aerosols, Radiation and Clouds), explicitly includes the physical and chemical effects due to the presence of clouds, aerosols and associated air chemistry. Using data from AOE-96 and themore » model BLMARC, the authors have begun a systematic effort to compare observations of the high Arctic boundary layer against numerical modeling results. The preliminary results for case963 and case964 are quite promising. The second period exhibits what appears to be bursting effects in the temperature, the winds and in the aerosol concentration and the modeling efforts have shown a similar set of features as well. Current work also includes model experiments with BLMARC on the aerosol nucleation and growth in the Arctic PBL and cloud and fog formation.« less
  • A model of litter decomposition was used to examine the potential effects of climate change on the decay of dead organic matter in a tussock tundra soil of northern Alaska, USA. Under current conditions (714% mean soil water content, 4.5[degrees]C mean soil temperature, 93-d season length), the model estimated a net release of 5.28g N[times]m[sup [minus]2][times]yr[sup [minus]1] and 79.5g CO[sub 2]-C[times]m[sup [minus]2][times]yr[sup [minus]1] from soil organic matter, respectively. These values are consistent with observations from field and laboratory studies of decomposition and plant growth. With changing climate, the greatest increase in net N release from dead organic matter (199% ofmore » current value), occurred at 600% soil moisture, 140-d season and 8.5[degrees]C mean summer temperature. The least amount of N was immobilized (46% of current value) at the present temperature, 70-d season and 1000% soil moisture content. Season length had little affect on the size of the mineral N pool, although pool size does respond to temperature and soil moisture content; ranging from 12-25 mg N[times]m[sup [minus]2]. Model results also indicate that patterns of net C and N mineralization need not be similar. Net C mineralization, estimated as cumulative CO[sub 2] efflux, is roughly proportional to total C transfer through the decomposer community. However, net N mineralization is not as closely related to mineral N pool size because of the high immobilization potential of tussock tundra soils.« less
  • Abstract not provided.
  • The Great Plains Center for Global Environmental Change (GPRC), located at the University of Nebraska, has established a program focused on assessing the impact of climate change on a grassland biome. Primary research thrusts of the GPRC are: (1) the quantification of the consequences of climate change for managed and unmanaged ecosystems in grasslands, including assessment of the adaptive capacity of such ecosystems and any ecosystem-climate feedback; and (2) the measurement and modeling of net exchanges of energy-relevant, radiactivity-active trace gases between terrestrial grassland ecosystems and the atmosphere. The GPRC supports an integrated program involving scientists from several states andmore » focusing on the Great Plains. It supports field-based process studies to improve understanding of the basic climate interactions with physical and biological systems. Particular emphasis is on modeling and measuring net carbon exchange in key Great Plains ecosystems. The GPRC supports development of climate change scenarios for impact analyses and the development of models to synthesize results of process studies that can estimate regional scale consequences of climate change on some aspect of the natural resources base of the Great Plains.« less