PubAg

Main content area

Search

228  Search Results

« Previous | 1 - 20 of 228 |
Number of results to display per page

Search Results

1. Plasticity in elk migration timing is a response to changing environmental conditions

Author:
Rickbeil, Gregory J. M.; Merkle, Jerod A.; Anderson, Greg; Atwood, M. Paul; Beckmann, Jon P.; Cole, Eric K.; Courtemanch, Alyson B.; Dewey, Sarah; Gustine, David D.; Kauffman, Matthew J.; McWhirter, Douglas E.; Mong, Tony; Proffitt, Kelly; White, Patrick J.; Middleton, Arthur D.
Source:
Global change biology 2019 v.25 no.7 pp. 2368-2381
ISSN:
1354-1013
Subject:
snowmelt,   etc   ; autumn; climatic factors; ecosystems; elks; forage; herds; phenology; snow; spring; summer; telemetry; winter;     Show all 13 Subjects
Abstract:
... Migration is an effective behavioral strategy for prolonging access to seasonal resources and may be a resilient strategy for ungulates experiencing changing climatic conditions. In the Greater Yellowstone Ecosystem (GYE), elk are the primary ungulate, with approximately 20,000 individuals migrating to exploit seasonal gradients in forage while also avoiding energetically costly snow conditions. H ...
DOI:
10.1111/gcb.14629

2. Probabilistic Snow Cover and Ensemble Streamflow Estimations in the Upper Euphrates Basin

Author:
Şorman, A. Arda; Uysal, Gökçen; Şensoy, Aynur
Source:
Vodohospodársky časopis 2019 v.67 no.1 pp. 82-92
ISSN:
0042-790X
Subject:
Snowmelt Runoff Model; snowmelt,   etc   ; basins; melting; moderate resolution imaging spectroradiometer; mountains; prediction; probability; probability analysis; remote sensing; runoff; snow; snowpack; spatial variation; spring; stream flow; summer; temperature; temporal variation; Turkey (country);     Show all 20 Subjects
Abstract:
... Predicting snow cover dynamics and relevant streamflow due to snowmelt is a challenging issue in mountainous basins. Spatio-temporal variations of snow extent can be analyzed using probabilistic snow cover maps derived from satellite images within a relatively long period. In this study, Probabilistic Snow Depletion Curves (P-SDCs) and Probabilistic Snow Lines (P-SLs) are acquired from Moderate Re ...
DOI:
10.2478/johh-2018-0025

3. Geomorphic complexity and sensitivity in channels to fire and floods in mountain catchments

Author:
Brogan, Daniel J.; MacDonald, Lee H.; Nelson, Peter A.; Morgan, Jacob A.
Source:
Geomorphology 2019 v.337 pp. 53-68
ISSN:
0169-555X
Subject:
snowmelt,   etc   ; burning; fires; floods; runoff; sediment deposition; sediments; spring; storms; summer; topographic slope; watersheds; Colorado; Rocky Mountain region;     Show all 14 Subjects
Abstract:
... Fires and floods are important drivers of geomorphic change. While the hydrologic and geomorphic effects of fires have been studied at the hillslope scale, we have much more limited data on post-fire runoff, channel changes, and inferred or measured sediment storage and delivery at larger scales. In this study we intensively documented channel changes over four years in two very similar ∼15 km2 ca ...
DOI:
10.1016/j.geomorph.2019.03.031

4. Response of vegetation carbon uptake to snow-induced phenological and physiological changes across temperate China

Author:
Chen, Shiliu; Huang, Yuefei; Wang, Guangqian
Source:
The Science of the total environment 2019 v.692 pp. 188-200
ISSN:
0048-9697
Subject:
snowmelt,   etc   ; carbon; climate change; gross primary productivity; growing season; phenology; photosynthesis; snow; snowpack; soil water; spring; summer; temperate zones; terrestrial ecosystems; vegetation; water stress; winter; China;     Show all 18 Subjects
Abstract:
... Snow cover, which is undergoing significant change along with global climate change, has considerable impacts on the functioning of terrestrial ecosystems. However, how snow cover change affects the vegetation gross primary production (GPP) in temperate regions still requires in-depth exploration. In this study, we investigated how changes in the winter snow depth (WSD) and snowmelt date (SMD) aff ...
DOI:
10.1016/j.scitotenv.2019.07.222

5. Redox conditions and pH control trace element concentrations in a meandering stream and shallow groundwater of a semiarid mountain watershed, Red Canyon, Wyoming, USA

Author:
Carling, Gregory T.; Romanowicz, Edwin A.; Jin, Li; Fernandez, Diego P.; Tingey, David G.; Goodsell, Timothy H.
Source:
Environmental earth sciences 2019 v.78 no.16 pp. 510
ISSN:
1866-6280
Subject:
snowmelt,   etc   ; arsenic; base flow; biogeochemistry; groundwater; hydrochemistry; iron; manganese; mountains; oxygen; pH; runoff; sorption; spring; stable isotopes; streams; summer; surface water; watersheds; Wyoming;     Show all 20 Subjects
Abstract:
... The interface between oxic surface water and anoxic groundwater plays an important role in trace element cycling in mountains streams. In this investigation, stream water and shallow groundwater were sampled in a semiarid mountain catchment at Red Canyon, Wyoming, USA to evaluate variability in redox conditions and trace element concentrations. Samples were collected in July 2013 during summer bas ...
DOI:
10.1007/s12665-019-8528-1

6. The individual and combined effects of snowmelt timing and frost exposure on the reproductive success of montane forbs

Author:
Pardee, Gabriella L.; Jensen, Isaac O.; Inouye, David W.; Irwin, Rebecca E.
Source:
Thejournal of ecology 2019 v.107 no.4 pp. 1970-1981
ISSN:
0022-0477
Subject:
snowmelt,   etc   ; climate change; environmental factors; flowering; flowers; forbs; frost; frost injury; fruits; phenology; plant communities; plant reproduction; pollen; pollinators; reproductive success; seed set; snow; spring; summer; wild flowers;     Show all 20 Subjects
Abstract:
... Changes from historic weather patterns have affected the phenology of many organisms world‐wide. Altered phenology can introduce organisms to novel abiotic conditions during growth and modify species interactions, both of which could drive changes in reproduction. We explored how climate change can alter plant reproduction using an experiment in which we manipulated the individual and combined eff ...
DOI:
10.1111/1365-2745.13152

7. Streamflow response to snow regime shift associated with climate variability in four mountain watersheds in the US Great Basin

Author:
Tang, Guoping; Li, Shuping; Yang, Muzhen; Xu, Zhenwu; Liu, Yonglin; Gu, Hui
Source:
Journal of hydrology 2019 v.573 pp. 255-266
ISSN:
0022-1694
Subject:
snowmelt,   etc   ; arid zones; autumn; base flow; basins; climatic factors; rain; simulation models; snow; soil water; soil water content; spring; summer; vegetation; water resources; watersheds; winter; United States;     Show all 18 Subjects
Abstract:
... Mountain watersheds serve as important water sources for socioeconomic activities in semiarid and arid regions. This study examined the streamflow response to snow regime shifts associated with climate variability in the US Great Basin. To this end, the coupled hydro-ecological simulation system (CHESS), a process-based and distributed model, was applied to four mountain watersheds in the US Great ...
DOI:
10.1016/j.jhydrol.2019.03.021

8. Hydrologic functioning of the deep critical zone and contributions to streamflow in a high‐elevation catchment: Testing of multiple conceptual models

Author:
Dwivedi, Ravindra; Meixner, Thomas; McIntosh, Jennifer C.; Ferré, P.A. Ty; Eastoe, Christopher J.; Niu, Guo‐Yue; Minor, Rebecca L.; Barron‐Gafford, Greg A.; Chorover, Jon
Source:
Hydrological processes 2019 v.33 no.4 pp. 476-494
ISSN:
0885-6087
Subject:
snowmelt,   etc   ; atmospheric precipitation; base flow; chemical composition; groundwater; hydrogeochemistry; mixing; models; monsoon season; mountains; seasonal variation; soil water; spring; storage time; streams; summer; topography; tritium; watersheds; winter; Arizona;     Show all 21 Subjects
Abstract:
... High‐elevation mountain catchments are often subject to large climatic and topographic gradients. Therefore, high‐density hydrogeochemical observations are needed to understand water sources to streamflow and the temporal and spatial behaviour of flow paths. These sources and flow paths vary seasonally, which dictates short‐term storage and the flux of water in the critical zone (CZ) and affect lo ...
DOI:
10.1002/hyp.13363

9. Improving Alpine Summertime Streamflow Simulations by the Incorporation of Evapotranspiration Data

Author:
Tobin, Kenneth J.; Bennett, Marvin E.
Source:
Water 2019 v.11 no.1
ISSN:
2073-4441
Subject:
snowmelt,   etc   ; Soil and Water Assessment Tool model; basins; energy balance; evaporation; evapotranspiration; moderate resolution imaging spectroradiometer; mountains; spectrometers; spring; stream flow; summer; watersheds; Idaho;     Show all 14 Subjects
Abstract:
... Over the last decade, autocalibration routines have become commonplace in watershed modeling. This approach is most often used to simulate a streamflow at a basin’s outlet. In alpine settings, spring/early summer snowmelt is by far the dominant signal in this system. Therefore, there is great potential for a modeled watershed to underperform during other times of the year. This tendency has ...
DOI:
10.3390/w11010112

10. Impact of bimodal textural heterogeneity and connectivity on flow and transport through unsaturated mine waste rock

Author:
Appels, Willemijn M.; Ireson, Andrew M.; Barbour, S. Lee
Source:
Advances in water resources 2018 v.112 pp. 254-265
ISSN:
0309-1708
Subject:
snowmelt,   etc   ; autumn; leaching; preferential flow; rain; soil; solutes; spring; statistics; summer; texture; wastes;     Show all 12 Subjects
Abstract:
... Mine waste rock dumps have highly variable flowpaths caused by contrasting textures and geometry of materials laid down during the ‘plug dumping’ process. Numerical experiments were conducted to investigate how these characteristics control unsaturated zone flow and transport. Hypothetical profiles of inner-lift structure were generated with multiple point statistics and populated with hydraulic p ...
DOI:
10.1016/j.advwatres.2017.12.008

11. American Pika (Ochotona princeps) Population Survival in Winters with Low or No Snowpack

Author:
Smith, Andrew T.; Millar, Constance I.
Source:
Western North American naturalist 2018 v.78 no.2 pp. 126-132
ISSN:
1527-0904
Subject:
snowmelt,   etc   ; Ochotona princeps; animals; climate change; mountains; prediction; snow; snowpack; spring; summer; survival rate; temperature; thermoregulation; vegetation; winter; California;     Show all 16 Subjects
Abstract:
... A prediction that has gained considerable traction in the American pika (Ochotona princeps) literature is that because of climate change, high mortality is likely to occur in winters of low or early snowmelt and cause extirpation of local populations. The basis for this prediction is the perception that the absence of an insulative layer of snow to protect pikas from severe winter cold temperature ...
DOI:
10.3398/064.078.0203

12. The effect of the Tambora eruption on Swiss flood generation in 1816/1817

Author:
Rössler, Ole; Brönnimann, Stefan
Source:
The Science of the total environment 2018 v.627 pp. 1218-1227
ISSN:
0048-9697
Subject:
snowmelt,   etc   ; basins; climate; ecosystems; hydrologic models; hydrometeorology; rain; snow; snowpack; spring; summer; temperature; winter; Lake Constance; Switzerland;     Show all 15 Subjects
Abstract:
... The Tambora volcano erupted in April 1815 caused many direct and indirect impacts on the climate system, as well as ecosystems and societies around the world. In Switzerland, the eruption contributed to the 1816 “Year Without a Summer”, which is considered to be a key factor in generating the highest flooding ever documented of the Lake Constance (7th July 1817) and the flood of the Rhine in Basel ...
DOI:
10.1016/j.scitotenv.2018.01.254

13. Modelling the Athabasca watershed snow response to a changing climate

Author:
Dibike, Yonas; Eum, Hyung-Il; Prowse, Terry
Source:
Journal of hydrology 2018 v.15 pp. 134-148
ISSN:
2214-5818
Subject:
snowmelt,   etc   ; altitude; climate; climate change; emissions; hydrologic models; meteorological data; rivers; snow; spring; summer; water storage; watersheds;     Show all 13 Subjects
Abstract:
... The Athabasca River basin (ARB) with its head-waters located within the Canadian Rockies.Investigating the snow response of the Athabasca watershed to projected climate using the Variable Infiltration Capacity (VIC) hydrologic model and statistically downscaled future climate data from a selected set of CMIP5 GCMs forced with RCP4.5 and RCP8.5 emissions scenarios.High resolution end-of-century pro ...
DOI:
10.1016/j.ejrh.2018.01.003

14. Temperature sensitivity of soil respiration across multiple time scales in a temperate plantation forest

Author:
Yan, Tao; Song, Huanhuan; Wang, Zhaoqi; Teramoto, Munemasa; Wang, Jinsong; Liang, Naishen; Ma, Chao; Sun, Zhenzhong; Xi, Yi; Li, Lili; Peng, Shushi
Source:
The Science of the total environment 2019 v.688 pp. 479-485
ISSN:
0048-9697
Subject:
snowmelt,   etc   ; Larix; autumn; carbon; drought; fine roots; forest plantations; global warming; growing season; leaves; microbial activity; nonlinear models; prediction; root growth; simulation models; soil carbon; soil respiration; soil temperature; soil water; spring; summer; terrestrial ecosystems; China;     Show all 23 Subjects
Abstract:
... Soil respiration (Rs) is the largest carbon (C) flux from terrestrial ecosystems to the atmosphere. Predictions of Rs and associated feedback to climate change remain largely uncertain, in part due to the high temporal heterogeneity of temperature sensitivity (apparent Q10) of Rs under a changing climate. Therefore, it is of critical importance to provide better insight into how Q10 varies across ...
DOI:
10.1016/j.scitotenv.2019.06.318

15. Volatile emissions from thawing permafrost soils are influenced by meltwater drainage conditions

Author:
Kramshøj, Magnus; Albers, Christian N.; Svendsen, Sarah H.; Björkman, Mats P.; Lindwall, Frida; Björk, Robert G.; Rinnan, Riikka
Source:
Global change biology 2019 v.25 no.5 pp. 1704-1716
ISSN:
1354-1013
Subject:
snowmelt,   etc   ; B horizons; alkanes; biogeochemistry; carbon; climate models; drainage; ecosystems; emissions; environmental factors; fen soils; gases; global warming; ketones; permafrost; radiative forcing; spring; summer; temperature; thawing; tundra; volatile organic compounds; wetlands; Arctic region;     Show all 24 Subjects
Abstract:
... Vast amounts of carbon are bound in both active layer and permafrost soils in the Arctic. As a consequence of climate warming, the depth of the active layer is increasing in size and permafrost soils are thawing. We hypothesize that pulses of biogenic volatile organic compounds are released from the near‐surface active layer during spring, and during late summer season from thawing permafrost, whi ...
DOI:
10.1111/gcb.14582

16. Assessing climate change impacts on water resources and crop yield: a case study of Varamin plain basin, Iran

Author:
Shahvari, Negar; Khalilian, Sadegh; Mosavi, Seyed Habibollah; Mortazavi, Seyed Abolghasem
Source:
Environmental monitoring and assessment 2019 v.191 no.3 pp. 134
ISSN:
0167-6369
Subject:
snowmelt,   etc   ; Soil and Water Assessment Tool model; atmospheric precipitation; autumn; basins; case studies; climate change; crop yield; drought; evapotranspiration; horticultural crops; irrigation; runoff; spring; summer; temperature; uncertainty; water resources; winter; Iran;     Show all 20 Subjects
Abstract:
... This research evaluated climate change impacts on water resources using soil and water assessment tool (SWAT) models under representative concentration pathway scenarios (RCP 2.6, RCP 6, RCP 8.5). First, drought intensity was calculated using the standardized precipitation index (SPI) for the period 1987–2016. Then, the coefficients of precipitation as well as minimum and maximum temperature chang ...
DOI:
10.1007/s10661-019-7266-x

17. Hydrological and sedimentary controls over fluvial thermal erosion, the Lena River, central Yakutia

Author:
Tananaev, Nikita I.
Source:
Geomorphology 2016 v.253 pp. 524-533
ISSN:
0169-555X
Subject:
snowmelt,   etc   ; floodplains; floods; rivers; spring; summer; topsoil; water analysis; Siberia;     Show all 9 Subjects
Abstract:
... Water regime and sedimentary features of the middle Lena River reach near Yakutsk, central Yakutia, were studied to assess their control over fluvial thermal erosion. The Lena River floodplain in the studied reach has complex structure and embodies multiple levels varying in height and origin. Two key sites, corresponding to high and medium floodplain levels, were surveyed in 2008 to describe majo ...
DOI:
10.1016/j.geomorph.2015.11.009

18. The impact of climate change on inland waterway transport: Effects of low water levels on the Mackenzie River

Author:
Scheepers, H.; Wang, J.; Gan, T.Y.; Kuo, C.C.
Source:
Journal of hydrology 2018 v.566 pp. 285-298
ISSN:
0022-1694
Subject:
snowmelt,   etc   ; air temperature; climate; climate change; climate models; evapotranspiration; hydrologic models; inland waterway transport; rivers; runoff; spring; stream flow; summer; watersheds; winter; Arctic region;     Show all 16 Subjects
Abstract:
... Potential impact of climate change on the inland waterway transport of the Mackenzie River Basin (MRB) have been investigated through simulations of the Hydrologiske Byrån avdeling för Vattenbalans (HBV) hydrological model, the HBV-light, for the baseline, 1974–2004, and future periods of 2041–2070 and 2071–2100 over the MRB driven by precipitation and air temperature data of Representative Concen ...
DOI:
10.1016/j.jhydrol.2018.08.059

19. Impact of aerosols on reservoir inflow: A case study for Big Creek Hydroelectric System in California

Author:
Kabir, Farzana; Yu, Nanpeng; Yao, Weixin; Wu, Longtao; Jiang, Jonathan H.; Gu, Yu; Su, Hui
Source:
Hydrological processes 2018 v.32 no.22 pp. 3365-3390
ISSN:
0885-6087
Subject:
snowmelt,   etc   ; aerosols; case studies; chemistry; hydroelectric power; lakes; regression analysis; risk; runoff; snow; spring; streams; summer; temperature; weather research and forecasting model; California;     Show all 16 Subjects
Abstract:
... Accurate and reliable reservoir inflow forecast is instrumental to the efficient operation of the hydroelectric power systems. It has been discovered that natural and anthropogenic aerosols have a great influence on meteorological variables such as temperature, snow water equivalent, and precipitation, which in turn impact the reservoir inflow. Therefore, it is imperative for us to quantify the im ...
DOI:
10.1002/hyp.13265

20. Pivotal Role of Snow Deposition and Melting Driving Fluxes of Polycyclic Aromatic Hydrocarbons at Coastal Livingston Island (Antarctica)

Author:
Casal, Paulo; Cabrerizo, Ana; Vila-Costa, Maria; Pizarro, Mariana; Jiménez, Begoña; Dachs, Jordi
Source:
Environmental science & technology 2018 v.52 no.21 pp. 12327-12337
ISSN:
1520-5851
Subject:
snowmelt,   etc   ; air; coastal water; ecosystems; lichens; melting; plankton; polycyclic aromatic hydrocarbons; salinity; seawater; snow; soil; spring; summer; temperature; volatile organic compounds; volatilization; Antarctica; Polar Regions;     Show all 19 Subjects
Abstract:
... The atmosphere–land–ocean dynamics of semivolatile organic compounds in polar regions is poorly understood, also for the abundant and ubiquitous polycyclic aromatic hydrocarbons (PAHs). We report the concentrations and fluxes of PAHs in a polar coastal ecosystem (Livingston Island, Antarctica). From late spring (December 2014) to late summer (February 2015), we sampled air, snow, coastal seawater, ...
DOI:
10.1021/acs.est.8b03640