Constraining the Aerosol Radiative Forcing and Climate Sensitivity     

L. D. Danny Harvey 《Climatic change》2000,44(4):413-418

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Ground Stone Analysis: A Technological Approach, 2nd ed. Jenny L. Adams. 2014. The University of Utah Press and American Southwest,Salt Lake City, 336 pp., color, $40 (paperback).     

Danny Rosenberg 《Geoarchaeology》2015,30(5):454-455

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An annually resolved bristlecone pine carbon isotope chronology for the last millennium     

Roderick J. Bale  Iain Robertson  Neil J. Loader  Mary Gagen  Danny McCarroll 《Quaternary Research》2011,76(1):22-29

We present the first near millennium-length, annually resolved stable isotope record from bristlecone pines (Pinus longaeva, D.K Bailey). The carbon isotope ratios from the cellulose of seven trees from the White Mountains of California, corrected for anthropogenic changes in atmospheric chemistry, are used to reconstruct growing season (June through August) precipitation back to AD 1085. Extremely negative isotope results are strongly correlated with proposed severest El Niño events over the last 500 yr, and similar values in the first half of the millennium are used to reconstruct a further 13 strong El Niño events, concentrated in the 12th Century and the mid 13th and 14th Centuries. Ring-width chronologies from adjacent sites in the White Mountains demonstrate a high degree of decadal covariance with the δ¹³C series, although there are several periods of notable divergence.  相似文献   

Degree of rock surface weathering as an indicator of ice-sheet thickness along an east—west transect across southern Norway     

Atle Nesje  Danny McCarroll  Svein Olaf Dahl 《第四纪科学杂志》1994,9(4):337-347

Rock surface weathering, as reflected by rock surface hardness and roughness, was measured at six mountains along an east-west transect across southern Norway. At most sites the results show significant differences in rock surface weathering across the autochthonous blockfield boundary, suggesting that the areas above the boundary have been exposed to subaerial weathering for a considerably longer time span that the areas below. The results are interpreted as reflecting the surface profile of an asymmetric, west-centred, low-gradient ice sheet.  相似文献   

Broad-band deconvolution of GDSN data     

Danny Harvey  George L. Choy 《Geophysical Journal International》1982,69(3):659-668

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Supporting dynamic pipeline changes using Class-Based Object Versioning in Astro-WISE     

Johnson Mwebaze  Danny Boxhoorn  Idris Rai  Edwin A. Valentijn 《Experimental Astronomy》2013,35(1-2):157-186

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The Astro-WISE optical image pipeline     

John P. McFarland  Gijs Verdoes-Kleijn  Gert Sikkema  Ewout M. Helmich  Danny R. Boxhoorn  Edwin A. Valentijn 《Experimental Astronomy》2013,35(1-2):45-78

We have designed and implemented a novel way to process wide-field astronomical data within a distributed environment of hardware resources and humanpower. The system is characterized by integration of archiving, calibration, and post-calibration analysis of data from raw, through intermediate, to final data products. It is a true integration thanks to complete linking of data lineage from the final catalogs back to the raw data. This paper describes the pipeline processing of optical wide-field astronomical data from the WFI (http://www.eso.org/lasilla/instruments/wfi/) and OmegaCAM (http://www.astro-wise.org/~omegacam/) instruments using the Astro-WISE information system (the Astro-WISE Environment or simply AWE). This information system is an environment of hardware resources and humanpower distributed over Europe. AWE is characterized by integration of archiving, data calibration, post-calibration analysis, and archiving of raw, intermediate, and final data products. The true integration enables a complete data processing cycle from the raw data up to the publication of science-ready catalogs. The advantages of this system for very large datasets are in the areas of: survey operations management, quality control, calibration analyses, and massive processing.  相似文献   

Forest dynamics and the importance of place in western Honduras     

Danny Redo  J.O. Joby Bass  Andrew C. Millington 《Applied geography (Sevenoaks, England)》2009,29(1):91-110

Analyses of landscape change using remotely sensed satellite imagery constitute a large component of forest transition research, allowing for assessments of large areas. In the western highlands of Honduras is an area of complex forest dynamics (～45,000 ha) that has seen significant forest regeneration in recent years. However, analysis of the larger region (～500,000 ha) shows net forest loss. The comparative aspects highlight the importance of site selection and scale in forest transition analysis, a process often ignored in the land-use and land-cover change (LULCC) and forest transition literature. Results also highlight the importance of analyzing human-induced fragmentation at a variety of selected sites and a range of spatial scales, and producing quality, accurate forest cover and change maps.  相似文献   

Trace elements in tissues of cetacean species rarely stranded along the Israeli Mediterranean coast     

Efrat Shoham-Frider  Dan Kerem  Mia Roditi-Elasar  Oz Goffman  Danny Morick  Olga Yoffe  Nurit Kress 《Marine pollution bulletin》2014

In this paper we present the concentrations of Hg, Cd, Se, Pb, Cu, Mn, Zn and Fe in organs of 6 non-common specimens of cetaceans that were stranded along the Israeli Mediterranean coast (IMC), during 2002–2010: two fin whales, one minke whale, one Cuvier’s beaked whale, one rough-toothed dolphin, and one Risso’s dolphin. Most of the specimens were calves stranded by accident. Concentrations of Hg and Cd were low in tissues of the baleen whales and higher in the toothed whales, with maximum concentrations of 1067 mg kg⁻¹ Hg in the liver of the Risso’s dolphin and 29 mg kg⁻¹ Cd in the kidney of the Cuvier’s beaked whale. As far as we are aware, this is the first report of trace elements in baleen whales in the Eastern Mediterranean, and the first report of trace elements in minke whale and rough-toothed dolphin in the Mediterranean.  相似文献   

Changes in atmospheric circulation and the Arctic Oscillation preserved within a millennial length reconstruction of summer cloud cover from northern Fennoscandia   总被引：3，自引：3，他引：0  

Giles H. F. Young  Danny McCarroll  Neil J. Loader  Mary H. Gagen  Andreas J. Kirchhefer  Joanne C. Demmler 《Climate Dynamics》2012,39(1-2):495-507

Cloud cover currently represents the single greatest source of uncertainty in General Circulation Models. Stable carbon isotope ratios (δ¹³C) from tree-rings, in areas of low moisture stress, are likely to be primarily controlled by photosynthetically active radiation (PAR), and therefore should provide a proxy record for cloud cover or sunshine; indeed this association has previously been demonstrated experimentally for Scots pine in Fennoscandia, with sunlight explaining ca 90% of the variance in photosynthesis and temperature only ca 4%. We present a statistically verifiable 1011-year reconstruction of cloud cover from a well replicated, annually-resolved δ¹³C record from Forfjord in coastal northwestern Norway. This reconstruction exhibits considerable variability in cloud cover over the past millennium, including extended sunny periods during the cool seventeenth and eighteenth centuries and warm cloudy periods during the eleventh, early fifteenth and twentieth centuries. We find that while a generally positive relationship persists between sunshine and temperature at high-frequency, at lower (multi-decadal) frequencies the relationship is more often a negative one, with cool periods being sunny (most notably the Little Ice Age period from 1600 to 1750 CE) and warm periods more cloudy (e.g. the mediaeval and the twentieth century). We conclude that these long-term changes may be caused by changes in the dominant circulation mode, likely to be associated with the Arctic Oscillation. There is also strong circumstantial evidence that prolonged periods of high summer cloud cover, with low PAR and probably high precipitation, may be in part responsible for major European famines caused by crop failures.  相似文献