Results 101 to 110 of about 265,793 (302)

Warming summers limit reindeer grazing, weakening herbivory pressure in the mountain tundra

open access: yesEcography, EarlyView.
Climate change is predicted to alter species interactions by exposing ecosystems to increasingly frequent and intense warm spells. In the mountain tundra, grazing by large herbivores, particularly reindeer, can limit shrub expansion and preserve Arctic plant diversity.
Marianne Stoessel   +2 more
wiley   +1 more source

Preliminary Evaluation of the AFWA-NASA (ANSA) Blended Snow-Cover Product over the Lower Great Lakes Region [PDF]

open access: yes, 2009
The Air Force Weather Agency (AFWA) - NASA (ANSA) blended-snow product utilizes EOS standard snow products from the Moderate-Resolution Imaging Spectroradiometer (MODIS) and the Advanced Microwave Scanning Radiometer for EOS (AMSR-E) to map daily snow ...
Chien, Janet Y. L.   +5 more
core   +1 more source

The relation between sea ice thickness and freeboard in the Arctic [PDF]

open access: yes, 2010
Retrieval of Arctic sea ice thickness from CryoSat-2 radar altimeter freeboard data requires observational data to verify the relation between these two variables.
J. Wahlin   +3 more
core   +1 more source

Carbon Dots: An Emerging Frontier for Green and Sustainable Civil Engineering Materials

open access: yesENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
Traditional civil engineering materials (CE materials) are usually involved with high‐energy consumption during manufacturing, significant maintenance costs, and substantial environmental impacts throughout their life cycles. The progress of nanotechnology is catalyzing a green and sustainable transformation within the field.
Weiwen Hao   +5 more
wiley   +1 more source

Metamorphism and thermal properties of fresh snow (study in the Moscow region)

open access: yesЛëд и снег, 2016
As a result of laboratory tests were obtained values of the coefficient thermal conductivity (Keff) of new snow for different types of the solid precipitation: plates, needles, stellars, graupels.
R. A. Chernov
doaj   +1 more source

Commentary on comparison of MODIS snow cover and albedo products with ground observations over the mountainous terrain of Turkey [PDF]

open access: yes, 2006
International audienceThe MODerate-resolution Imaging Spectroradiometer (MODIS) snow cover product was evaluated by Parajka and Blösch (2006) over the territory of Austria.
?ensoy, A.   +4 more
core   +3 more sources

Behavior of Long‐Slotted Perforated Steel Plate Fuses in Timber Brace End Connections

open access: yesEarthquake Engineering &Structural Dynamics, EarlyView.
ABSTRACT Steel perforated plate fuses have emerged as a promising solution for mass timber seismic force‐resisting systems, offering tunable energy dissipation mechanisms, such as flexural and shear yielding, through geometric adjustments. This study examines the cyclic performance of perforated steel plate fuses employed in timber braced frames, with ...
Yahia Ahmed   +2 more
wiley   +1 more source

Analytical Formulas of Molecular Ion Abundances and N2H+ Ring in Protoplanetary Disks [PDF]

open access: yes, 2015
We investigate the chemistry of ion molecules in protoplanetary disks, motivated by the detection of N$_2$H$^+$ ring around TW Hya. While the ring inner radius coincides with the CO snow line, it is not apparent why N$_2$H$^+$ is abundant outside the CO ...
Aikawa, Yuri   +3 more
core   +3 more sources

Relationship between new snow density and shape of snow crystals.

open access: yesJournal of the Japanese Society of Snow and Ice, 1989
新積雪の密度と気象要素および卓越結晶形との関係を詳しく調べるために, 秋田県鹿角市八幡平で6時間毎の観測を実施した.その結果次のことがわかった.1) 新積雪の密度は平均気温の低下と共にやや小さくなり, 平均風速の増加と共にやや大きくなる傾向を示したが, 卓越結晶形の相違による測定値のばらつきは相当大きかった.2) 平均気温が0℃以下のときには, 新積雪の密度は卓越結晶毎に, 雲粒付着の有無およびふぶきの有無を考慮して表わすことができる.
openaire   +2 more sources

Reliability and Degradation Mechanisms of Photovoltaic Modules in Pakistan

open access: yesEnergy Science &Engineering, EarlyView.
Reliability of the PV module. ABSTRACT The number of photovoltaic (PV) installations has grown rapidly in the last 10 years in Pakistan due to the growing electricity demand, the availability of favourable solar resources, and the national renewable energy objectives.
Zafar Ullah Khan   +2 more
wiley   +1 more source

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