71 research outputs found
Late-Glacial to Late-holocene Shifts in Global Precipitation Delta(sup 18)O
Reconstructions of Quaternary climate are often based on the isotopic content of paleo-precipitation preserved in proxy records. While many paleo-precipitation isotope records are available, few studies have synthesized these dispersed records to explore spatial patterns of late-glacial precipitation delta(sup 18)O. Here we present a synthesis of 86 globally distributed groundwater (n 59), cave calcite (n 15) and ice core (n 12) isotope records spanning the late-glacial (defined as 50,000 to 20,000 years ago) to the late-Holocene (within the past 5000 years). We show that precipitation delta(sup 18)O changes from the late-glacial to the late-Holocene range from -7.1% (delta(sup 18)O(late-Holocene) > delta(sup 18)O(late-glacial) to +1.7% (delta(sup 18)O(late-glacial) > delta(sup 18)O(late-Holocene), with the majority (77) of records having lower late-glacial delta(sup 18)O than late-Holocene delta(sup 18)O values. High-magnitude, negative precipitation delta(sup 18)O shifts are common at high latitudes, high altitudes and continental interiors
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Đ ĐŸĐ·ĐłĐ»ŃĐœŃŃĐŸ ĐŸŃĐŸĐ±Đ»ĐžĐČĐŸŃŃŃ Đ»ĐŸĐłŃŃĐœĐžŃ
ĐŽĐ”ĐČŃĐ°ŃŃĐč Ń ŃĐ”ĐșŃŃĐ°Ń
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Đ°ĐșŃŃĐČ, ŃĐșŃ Ń ŃĐșĐ»Đ°ĐŽĐŸĐČĐŸŃ ŃĐ°ŃŃĐžĐœĐŸŃ ĐŸŃŃŃŃĐčĐœĐŸ-ĐŽŃĐ»ĐŸĐČĐŸĐłĐŸ ŃŃĐžĐ»Ń ŃĐșŃĐ°ŃĐœŃŃĐșĐŸŃ Đ»ŃŃĐ”ŃĐ°ŃŃŃĐœĐŸŃ ĐŒĐŸĐČĐž. ĐĐ°ĐżŃĐŸĐżĐŸĐœĐŸĐČĐ°ĐœĐŸ ĐČлаŃĐœĐžĐč ĐżŃĐŽŃ
ŃĐŽ ĐŽĐŸ ĐșлаŃĐžŃŃĐșĐ°ŃŃŃ ĐČĐžŃĐČĐ»Đ”ĐœĐžŃ
Ń ŃĐ”ĐșŃŃĐ°Ń
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ĐșĐŸĐŽĐ”ĐșŃŃĐČ Đ»ĐŸĐłŃŃĐœĐŸ Đ°ĐœĐŸĐŒĐ°Đ»ŃĐœĐžŃ
ŃжОĐČĐ°ĐœŃ.The features of the logical deviations in the texts of laws which belong to the official style of Ukrainian literary language is under consideration. The taxonomy for the notion above in Ukrainian laws is proposed
Rotated Versions of the Jablonowski SteadyâState and Baroclinic Wave Test Cases: A Dynamical Core Intercomparison
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/95316/1/jame31.pd
EURECâŽA
The science guiding the EURECâŽA campaign and its measurements is presented. EURECâŽA comprised roughly 5 weeks of measurements in the downstream winter trades of the North Atlantic â eastward and southeastward of Barbados. Through its ability to characterize processes operating across a wide range of scales, EURECâŽA marked a turning point in our ability to observationally study factors influencing clouds in the trades, how they will respond to warming, and their link to other components of the earth system, such as upper-ocean processes or the life cycle of particulate matter. This characterization was made possible by thousands (2500) of sondes distributed to measure circulations on meso- (200âkm) and larger (500âkm) scales, roughly 400âh of flight time by four heavily instrumented research aircraft; four global-class research vessels; an advanced ground-based cloud observatory; scores of autonomous observing platforms operating in the upper ocean (nearly 10â000 profiles), lower atmosphere (continuous profiling), and along the airâsea interface; a network of water stable isotopologue measurements; targeted tasking of satellite remote sensing; and modeling with a new generation of weather and climate models. In addition to providing an outline of the novel measurements and their composition into a unified and coordinated campaign, the six distinct scientific facets that EURECâŽA explored â from North Brazil Current rings to turbulence-induced clustering of cloud droplets and its influence on warm-rain formation â are presented along with an overview of EURECâŽA's outreach activities, environmental impact, and guidelines for scientific practice. Track data for all platforms are standardized and accessible at https://doi.org/10.25326/165 (Stevens, 2021), and a film documenting the campaign is provided as a video supplement
EURECâŽA
The science guiding the EURECâŽA campaign and its measurements is presented. EURECâŽA comprised roughly 5 weeks of measurements in the downstream winter trades of the North Atlantic â eastward and southeastward of Barbados. Through its ability to characterize processes operating across a wide range of scales, EURECâŽA marked a turning point in our ability to observationally study factors influencing clouds in the trades, how they will respond to warming, and their link to other components of the earth system, such as upper-ocean processes or the life cycle of particulate matter. This characterization was made possible by thousands (2500) of sondes distributed to measure circulations on meso- (200âkm) and larger (500âkm) scales, roughly 400âh of flight time by four heavily instrumented research aircraft; four global-class research vessels; an advanced ground-based cloud observatory; scores of autonomous observing platforms operating in the upper ocean (nearly 10â000 profiles), lower atmosphere (continuous profiling), and along the airâsea interface; a network of water stable isotopologue measurements; targeted tasking of satellite remote sensing; and modeling with a new generation of weather and climate models. In addition to providing an outline of the novel measurements and their composition into a unified and coordinated campaign, the six distinct scientific facets that EURECâŽA explored â from North Brazil Current rings to turbulence-induced clustering of cloud droplets and its influence on warm-rain formation â are presented along with an overview of EURECâŽA's outreach activities, environmental impact, and guidelines for scientific practice. Track data for all platforms are standardized and accessible at https://doi.org/10.25326/165 (Stevens, 2021), and a film documenting the campaign is provided as a video supplement
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