منابع مشابه
Changing Northern Hemisphere Snow Seasons
Spatial and temporal patterns in the onset, offset, and length of the snow season across Northern Hemisphere continents are examined for the period from 1967 to 2008. Full snow seasons (FSS) and core snow seasons (CSS) are defined based on the consistency of snow cover within a location over the course of the cold season. Climatologically, the seasonal onsets of FSS and CSS progress more rapidl...
متن کاملAsynchrony of seasons: genetic differentiation associated with geographic variation in climatic seasonality and reproductive phenology.
Many organisms exhibit distinct breeding seasons tracking food availability. If conspecific populations inhabit areas that experience different temporal cycles in food availability spurred by variation in precipitation regimes, then they should display asynchronous breeding seasons. Thus, such populations might exhibit a temporal barrier to gene flow, which may potentially promote genetic diffe...
متن کاملthe effects of changing roughness on the flow structure in the bends
flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...
Marine plankton phenology and life history in a changing climate: current research and future directions
Increasing availability and extent of biological ocean time series (from both in situ and satellite data) have helped reveal significant phenological variability of marine plankton. The extent to which the range of this variability is modified as a result of climate change is of obvious importance. Here we summarize recent research results on phenology of both phytoplankton and zooplankton. We ...
متن کاملHORIZONS Marine plankton phenology and life history in a changing climate: current research and future directions
RUBAO JI 1,6*, MARTIN EDWARDS 2, DAVID L. MACKAS 3, JEFFREY A. RUNGE 4 AND ANDREW C. THOMAS 5 1 DEPARTMENT OF BIOLOGY, WOODS HOLE OCEANOGRAPHIC INSTITUTION, WOODS HOLE, MA 02543, USA, SIR ALISTER HARDY FOUNDATION FOR OCEAN SCIENCE, THE LABORATORY, CITADEL HILL, PLYMOUTH PL1 2PB, UK, INSTITUTE OF OCEAN SCIENCES, FISHERIES AND OCEANS CANADA, SIDNEY, BC, CANADA, 4 SCHOOL OF MARINE SCIENCES, UNIVER...
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ژورنال
عنوان ژورنال: Nature
سال: 1999
ISSN: 0028-0836,1476-4687
DOI: 10.1038/20065