搜索结果: 1-15 共查到“理学 Seasonality”相关记录23条 . 查询时间(0.093 秒)
Seasonality of bird migration responds to environmental cues,scientists show
Seasonality bird migration environmental cues scientists
2016/9/12
The seasonality of bird migration is shifting in response to climate change. As a result, birds in the United States are arriving at their northern breeding grounds earlier in spring -- and may be dep...
Most descriptions of sounds produced by whales at sea have been described from scattered, unsystematic observation and recording of animals during shipboard encounters. Such encounters provide data on...
Biological Structure and Seasonality in the Japan/East Sea
East Sea Biological Structure and Seasonality
2015/7/24
The Japan/East Sea (JES) contains several oceanic regions separated by dynamic boundaries. These distinct regions, and the physical features that establish and maintain the boundaries between the regi...
Solid phase phosphorus species and preservation of fish remains in marine sediments of areas of high primary productivity and oxygen seasonality (36°S, central South Chile)
fish debris biogenic apatite seasonal coastal upwelling hypoxia central-south Chile
2017/4/10
The main input of phosphorus to the ocean is associated with river runoff, while this element leaves the marine system
via burial in the sediments. Solid phase P accumulation is a function of bottom ...
Formic acid above the Jungfraujoch during 1985–2007: observed variability, seasonality, but no long-term background evolution
Formic acid the Jungfraujoch 1985–2007 background evolution
2010/11/3
This paper reports on daytime total vertical column abundances of formic acid (HCOOH) above the Northern mid-latitude, high altitude Jungfraujoch station (Switzerland; 46.5° N, 8.0° E, 3580 m alt.). T...
Seasonality of Peroxyacetyl nitrate (PAN) in the upper troposphere and lower stratosphere using the MIPAS-E instrument
Peroxyacetyl nitrate the upper troposphere and lower stratosphere the MIPAS-E instrument
2010/8/16
The Michelson Interferometer for Passive Atmospheric Sounding onboard ENVISAT (MIPAS–E) offers the opportunity to detect and spectrally resolve many atmospheric minor constituents affecting atmospheri...
Effects of seasonality and resource limitation on organic matter turnover by Chironomidae (Diptera) in southern Appalachian headwater streams
seasonality resource limitation Chironomidae in southern Appalachian headwater streams
2014/4/17
Despite their high abundance, secondary production, and known reliance on detrital material, the role of chironomids (Diptera) in fine particulate organic matter (FPOM) dynamics has not been well quan...
Trends and seasonality of extreme precipitation characteristics related to mid-latitude cyclones in Europe
Trends seasonality extreme precipitation
2010/2/3
An attempt is made to study the extreme precipitation characteristics, which are related to the mid-latitude cyclonic systems. Daily pluviometric data, from several stations across the continental Eur...
Process-based simulation of seasonality and drought stress in monoterpene emission models
Process-based simulation seasonality and drought stress monoterpene emission models
2010/1/21
In this paper we propose the application of a mechanistic method for considering the seasonal dynamics of emission potential using the "Seasonal Isoprenoid synthase Model" (Lehning et al., 2001). We t...
Terrestrial climate variability and seasonality changes in the Mediterranean region between 15 000 and 4000 years BP deduced from marine pollen records
Terrestrial climate marine pollen records seasonality changes
2009/12/3
Pollen-based climate reconstructions were performed on two high-resolution pollen marines cores from the Alboran and Aegean Seas in order to unravel the climatic variability in the coastal settings of...
Trends and seasonality in stream water chemistry in two moorland catchments of the Upper River Wye, Plynlimon
stream water chemistry Upper River Wye moorland catchments
2009/6/8
Stream water chemistry in the Cyff and Gwy subcatchments within the headwaters of the River Wye has been monitored regularly since 1980. In the Gwy, which is a predominantly semi-natural grassland ca...
Aspects of seasonality and flood generating circulation patterns in a mountainous catchment in south-eastern Germany
flood generating seasonality circulation patterns south-eastern Germany
2009/5/12
Analyses of discharge series, precipitation fields and flood producing atmospheric circulation patterns reveal that two governing flood regimes exist in the Mulde catchment in south-eastern Germany: f...
Technical Note：Seasonality in alpine water resources management–a regional assessment
snow-making water resources management
2009/4/28
Alpine regions are particularly affected by seasonal variations in water demand and water availability. Especially the winter period is critical from an operational point of view, as being characteris...
Seasonality of N2 fixation and nifH gene diversity in the Gulf of Aqaba (Red Sea)
N2 fixation nifH gene diversity
2014/4/17
Nitrogen (N2) fixation rates were determined on bulk water collected in the Gulf of Aqaba, Red Sea, during
fall (stratified, oligotrophic) and spring (deep mixing, mesotrophic) seasons. N2
fixation ...
Peroxy radicals in the summer free troposphere: seasonality and potential for heterogeneous loss
Peroxy radicals summer free troposphere heterogeneous loss
2009/3/31
The sum of peroxy radicals (HO2+ΣiRiO2) and supporting trace gases were measured on the Jungfraujoch (3580 m a.s.l.) during the late summer of 2005. The period was marked by extended times of heavy sn...