Rethinking US climate advocacy     

Amy Luers 《Climatic change》2013,120(1-2):13-19

The US climate movement has failed to create the political support needed to pass significant climate policy. It is time to reassess climate advocacy. To develop a strategy for philanthropy to strengthen climate engagement, I interviewed over 40 climate advocates,more than a dozen representatives from the foundation community, and a dozen academics. My assessment led me to conclude that climate advocates have focused too narrowly on specific policy goals and insufficiently on influencing the larger political landscape. I suggest four ways to improve climate advocacy: 1) Increase focus on medium and longer-term goals; 2) Start with people and not carbon; 3) Focus more on values and less on science; and 4) Evaluate what works and share what we learn. To accomplish these strategies, social scientists and advocates must work together to build a culture of learning. Meanwhile, philanthropy must empower experimentation and incentivize knowledge sharing.  相似文献   

Systematic Errors Induced by the Elliptical Power-law model in Galaxy-Galaxy Strong Lens Modeling     

Xiaoyue Cao  Ran Li  J.W.Nightingale  Richard Massey  Andrew Robertson  Carlos S.Frenk  Aristeidis Amvrosiadis  Nicola C.Amorisco  Qiuhan He  Amy Etherington  Shaun Cole  Kai Zhu 《天文和天体物理学研究(英文版)》2022,(2):143-172

The elliptical power-law model of the mass in a galaxy is widely used in strong gravitational lensing analyses.However,the distribution of mass in real galaxies...  相似文献   

Virus occurrence in private and public wells in a fractured dolostone aquifer in Canada     

Amy S. Allen  Mark A. Borchardt  Burney A. KiekeJr  Kari E. Dunfield  Beth L. Parker 《Hydrogeology Journal》2017,25(4):1117-1136

Groundwater samples from 22 wells completed in a regional fractured dolostone aquifer in the Guelph region of southern Ontario, Canada, were collected over an 8-month period and analyzed for viruses and Campylobacter jejuni. Only 8% of the 118 samples exhibited viruses at extremely low concentrations, but of the 22 wells sampled, 10 (45%) were positive for human enteric viruses (polyomavirus, adenovirus A, and GII norovirus) including 5 of the 8 public supply wells (62.5%) and 5 of the 11 private wells (45%). Each virus-positive well had only one virus occurrence with six sampling events during the 8-month sampling campaign and only one virus type was detected in each well. The probability of virus detection was positively associated with well open-interval length. Virus concentration (in the wells that were virus-positive) was negatively associated with well depth and open-interval length and positively associated with overburden thickness (i.e., the thickness of unconsolidated materials overlying bedrock facies) and the amount of precipitation 8–14 and 15–21 days prior to the sampling date. The ephemeral nature of the virus detections and the low detection rate on a per sample basis were consistent with previous studies. The percentage of virus-positive wells, however, was much higher than previous studies, but consistent with the fact that the hydrogeologic conditions of fractured bedrock aquifers create wide capture zones and short groundwater travel times to wells making them more vulnerable to contamination occurrence but at very low concentrations.  相似文献   

Population Structure of Adult Blue Crabs, <Emphasis Type="Italic">Callinectes sapidus</Emphasis>, in Relation to Physical Characteristics in Barnegat Bay,New Jersey     

Paul R. Jivoff  Jennifer M. Smith  Valerie L. Sodi  Stacy M. VanMorter  Kathryn M. Faugno  Amy L. Werda  Margaret J. Shaw 《Estuaries and Coasts》2017,40(1):235-250

Blue crabs (Callinectes sapidus) are an important species in coastal or lagoonal estuaries where adult population characteristics may differ as compared to drowned-river estuaries. Barnegat Bay, in southern New Jersey, is composed of two large embayments: one without and one with a salinity gradient. We tested the influence of physical characteristics on the abundance, sex ratio, and size of adult blue crabs and examined variation in measures of reproductive potential (e.g., sperm stores) in both sexes in Barnegat Bay from June to September, 2008–2009. Population structure was distinct between the embayments due to sex-specific responses to salinity: male abundance was negatively correlated with salinity whereas adult females were more abundant in high salinity because of proximity to Barnegat Inlet. This produced high sex ratios in low salinity areas and low sex ratios in high salinity areas. Summer was a growing season for adult males while in late summer-early fall, juvenile males recruited to the adult size class. The spawning season lasted from May to August and ovigerous females were concentrated near the inlets. Information on female sperm stores and ovarian development identified two cohorts of adult females: females that will spawn in the current summer and females that will not spawn until the following summer. Thus, not all adult females near the spawning grounds were members of the current spawning stock. This suggests that annual estimates of spawning stock size which overlook the proximity of females to spawning are overestimating the current spawning stock in Barnegat Bay and other estuaries.  相似文献   

Geomorphic influences on the distribution and accumulation of pyrogenic carbon (PyC) following a low severity wildfire in northern New Mexico          下载免费PDF全文

Amy Galanter  Daniel Cadol  Kathleen Lohse 《地球表面变化过程与地形》2018,43(10):2207-2218

The distribution, transport, and accumulation of wildfire‐generated pyrogenic carbon (PyC) has important consequences for contaminant transport and carbon cycling, but a conceptual model for PyC accumulation and loss that includes geomorphic processes is lacking. In this study we quantified PyC concentration in soil samples collected from the Jemez Mountains of New Mexico before and after the 2013 Thompson Ridge (TR) fire, and developed a conceptual model describing PyC redistribution. Pre‐fire samples were fortuitously collected 4 years before the TR burn and post‐fire samples were collected at the same locations 15 months following the TR fire. Samples were collected from the O and A horizon, with sites representing a range of slope angle, aspect, burn severity, and geomorphic setting. PyC was determined by a modified chemo‐thermal oxidation method to compare PyC to total organic carbon (TOC). The mean PyC/TOC ratio was significantly higher post‐fire than pre‐fire (0.14 vs 0.12), indicating increased PyC sequestration. O horizon PyC concentrations were more variable and more responsive to fire than the A horizon. Soil horizon, watershed, and geomorphic setting proved to be the most influential factors in predicting PyC concentration changes. PyC concentrations increased most on hillslopes and in low‐severity burn areas, suggesting higher rates of PyC production or post‐fire accumulation. Burn patchiness appears to facilitate PyC accumulation, with lower severity patches trapping PyC mobilized from high severity patches. While PyC content had greater point scale variance following the fire, the fire also homogenized pre‐fire PyC differences between soil horizons and among watersheds within the burn perimeter, differences that appear to develop over time between fires. The O horizon is a larger sink for PyC in the short term following fire, but based on pre‐fire concentrations the A horizon appears to be a more stable sink for PyC. Copyright © 2018 John Wiley & Sons, Ltd.  相似文献   

Sourcing little Colorado white ware: A regional approach to the compositional analysis of prehistoric ceramics     

Amy A. Douglass  David M. Schaller 《Geoarchaeology》1993,8(3):177-201

Little Colorado White Ware (LCWW) is a decorated black-on-white ceramic constructed by the Anasazi in the southwestern United States from approximately A. D. 1050 to 1250. LCWW potsherds are found in archaeological sites located throughout the Little Colorado River valley of northern Arizona. Two major volcanic fields which are located on opposite sides of the Little Colorado River, the San Francisco Peaks in the west and the Hopi Buttes in the east, have been proposed as source areas for LCWW production. Petrographic, X-ray diffraction, and electron microprobe analyses of this ware's raw material constituents and geologic samples indicate that LCWW could only have been produced in the Hopi Buttes area. This study is presented as an example of a research design whose sample size, geographic scale, and methodologies can be effective in determining the source of prehistoric ceramics from the southwestern United States and elsewhere. © 1993 John Wiley & Sons, Inc.  相似文献   

Discussion of ‘Buried oblique‐slip faults in the Irish Caledonides’ by D. M. Williams     

Peter D. Clift  John F. Dewey  Amy E. Draut  Maria Mange 《Geological Journal》2003,38(1):99-100

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A century of nature: Twenty‐one discoveries that changed science and the world     

Amy L. Ollendorf 《Geoarchaeology》2006,21(6):639-641

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