The pleistocene deposits of the Portsmouth District and their relation to man     

L.S. Palmer  J.H. Cooke 《Proceedings of the Geologists' Association. Geologists' Association》1923,34(4):253-282

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On the Pleistocene succession of the Bristol district     

L.S. Palmer 《Proceedings of the Geologists' Association. Geologists' Association》1931,42(4):345-361

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Review of " the="" tectonic="" and="" climatic="" evolution="" of="" arabian="" sea="" region"."="     

Palmer  Martin 《Marine Geophysical Researches》2002,23(5-6):493-493

Marine Geophysical Research -  相似文献   

VLA observations of GRB error boxes     

D. M. Palmer  T. L. Cline  J. G. Laros  K. Hurley  G. J. Fishman  C. Kouveliotou 《Astrophysics and Space Science》1995,231(1-2):315-318

Very Large Array (VLA) radio observations of precisely-located GRB error boxes have been performed to search for fading and quiescent emission associated with -ray bursts. These observations were made as quickly as 23 hours and as late as 13 years after the time of the burst. Our measurements presented here have found GRB error boxes to be empty of sources to the 80 µJy level ( = 3.6 cm) at 9 months, to 1 mJy (20 cm) at 9 days, and probably to 5 mJy (20 cm) at 23 hours after the bursts.  相似文献   

On the Scale of Aggregation of Meio-benthic Copepods on a Tidal Mudflat     

J.W. Fleecer    M. A. Palmer  E.B. Moser 《Marine Ecology》1990,11(3):227-237

Abstract. The dispersion pattern of mciobenthic harpacticoid copepods was measured on a mudflat at different tidal conditions. Samples were collected using a 5 times 5 array of contiguous cores (8 mm ID), and analyzed by spatial autocorrelation (MOHAN'S I statistic). Four species were abundant, and all were judged to be patchy by autocorrelation. The apparent scale of patchincss did not differ with tidal stage. Three species were aggregated at very small spatial scales (0.5 to 1cm²), with patches probably distributed at random within a sampling array. The fourth species was also aggregated at the smallest spatial scale (neighboring cores), but may have been regularly spaced at distances longer than 5 cm. This study shows that processes on the order of several cm² must dictate the patch dynamics of small metazoans.  相似文献   

Annually laminated Late Pleistocene sediments from Llangorse Lake,South Wales,UK: a chronology for the pattern of ice wastage     

A.P. Palmer  J. Rose  J.J. Lowe  M.J.C. Walker 《Proceedings of the Geologists' Association. Geologists' Association》2008,119(3-4):245-258

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Nutrient limitation in two marine diatoms inhibits release of bromoform     

M Nguvava  B Kuyper  E Bucciarelli  H Waldron  C Palmer 《African Journal of Marine Science》2016,38(4):581-588

Bromoform released from phytoplankton and kelp in the ocean is the largest known carrier of bromine to the atmosphere. The photoproducts of atmospheric bromoform catalyse ozone depletion. Laboratory investigations were conducted into the link between nutrient limitation and bromoform production using axenic cultures of two warm-water diatoms (Chaetoceros neogracile and Phaeodactylum tricornutum). During exponential growth the bromoform production was 2 000–3 000 nmol bromoform (g Chl a)?1 h?1, i.e. 10–100 times higher than earlier values for temperate and cold-water diatoms. Bromoform production decreased down to zero under CO2 and nitrate limitation for both species. These results suggest that the bromoform production could be directly related to bromoperoxidase activity (and irradiance) only during exponential growth, whereas compounds other than bromoform might be formed under nutrient limitation.  相似文献   

Managing coastal zone fisheries: A Mediterranean case study     

Beatriz Morales-Nin  Antoni M. Grau  Miquel Palmer 《Ocean & Coastal Management》2010,53(3):99-106

Coastal fisheries are complex ecological and social systems, evolving in time with a shift from commercial towards recreational effort. We describe the coastal fisheries of Mallorca (W Mediterranean) and the management policies implemented to show the challenges faced at regional level to handle the different management tools used to conserve biodiversity and the social fabric in the coastal zone. Our example provides evidence of the complexity of fishing rights and how they can be adapted into practical fisheries management by combining fishing rights, open access recreational fishery, community-based management and biodiversity conservation.  相似文献   

Fire decreases near‐surface hydraulic conductivity and macropore flow in blanket peat          下载免费PDF全文

Joseph Holden  Catherine Wearing  Sheila Palmer  Benjamin Jackson  Kerrylyn Johnston  Lee E. Brown 《水文研究》2014,28(5):2868-2876

Many peatlands have been subjected to wildfire or prescribed burning, but it is not known how these fires influence near‐surface hydrological processes. Macropores are important flowpaths in the upper layers of blanket peat and were investigated through the use of tension disc infiltrometers, which also provide data on saturated hydraulic conductivity. Measurements were performed on unburnt peat (U), where prescribed burning had taken place 2 years (B2), 4 years (B4) and >15 (B15+) years prior to sampling, and where a wildfire (W) had taken place 4 months prior to sampling. Where there had been recent burning (B2, B4 and W), saturated hydraulic conductivity was approximately three times lower than where there was no burning (U) or where burning was last conducted >15 years ago (B15+). Similarly, the contribution of macropore flow to overall infiltration was significantly lower (between 12% and 25% less) in the recently burnt treatments compared to B15+ and U. There were no significant differences in saturated hydraulic conductivity or macropore flow between peat that had been subject to recent wildfire (W) and those that had undergone recent prescribed burning (B2 and B4). The results suggest that fire influences the near‐surface hydrological functioning of peatlands but that recovery in terms of saturated hydraulic conductivity and macropore flow may be possible within two decades if there are no further fires. Copyright © 2013 John Wiley & Sons, Ltd.  相似文献   

Simulating weather regimes: impact of model resolution and stochastic parameterization     

Andrew Dawson  T. N. Palmer 《Climate Dynamics》2015,44(7-8):2177-2193

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