Influence of wind upon water quality in Liverpool Bay     

P. Foster  K.B. Pugh  D.T.E. Hunt  G.M. Foster  G. Savidge 《Marine pollution bulletin》1977,8(1):11-12

Comprehensive distribution patterns of physical and chemical characteristics have been obtained from a series of cruises in Liverpool Bay. The marked feature of these distributions was their temporal variability, suggesting that the surface residual circulation is also temporally variable. The influence of wind stress upon the circulation pattern and hence water quality of this sea area is illustrated.  相似文献   

Ecohydrology--why hydrologists should care   总被引：1，自引：0，他引：1  

Hunt RJ  Wilcox DA 《Ground water》2003,41(3):289-289

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Foreword: Ground Water Flow Modeling with the Analytic Element Method     

Hendrik M. Haitjema  Randall J. Hunt  Igor Jankovic  Wim J. de Lange 《Ground water》2006,44(1):1-2

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The Medieval Warm Period, the Little Ice Age and simulated climatic variability   总被引：1，自引：0，他引：1  

B. G. Hunt 《Climate Dynamics》2006,27(7-8):677-694

The CSIRO Mark 2 coupled global climatic model has been used to generate a 10,000-year simulation for ‘present’ climatic conditions. The model output has been analysed to identify sustained climatic fluctuations, such as those attributed to the Medieval Warm Period (MWP) and the Little Ice Age (LIA). Since no external forcing was permitted during the model run all such fluctuations are attributed to naturally occurring climatic variability associated with the nonlinear processes inherent in the climatic system. Comparison of simulated climatic time series for different geographical locations highlighted the lack of synchronicity between these series. The model was found to be able to simulate climatic extremes for selected observations for century timescales, as well as identifying the associated spatial characteristics. Other examples of time series simulated by the model for the USA and eastern Russia had similar characteristics to those attributed to the MWP and the LIA, but smaller amplitudes, and clearly defined spatial patterns. A search for the frequency of occurrence of specified surface temperature anomalies, defined via duration and mean value, revealed that these were primarily confined to polar regions and northern latitudes of Europe, Asia and North America. Over the majority of the oceans and southern hemisphere such climatic fluctuations could not be sustained, for reasons explained in the paper. Similarly, sustained sea–ice anomalies were mainly confined to the northern hemisphere. An examination of mechanisms associated with the sustained climatic fluctuations failed to identify a role for the North Atlantic Oscillation, the El Niño-Southern Oscillation or the Pacific Decadal Oscillation. It was therefore concluded that these fluctuations were generated by stochastic processes intrinsic to the nonlinear climatic system. While a number of characteristics of the MWP and the LIA could have been partially caused by natural processes within the climatic system, the inability of the model to reproduce the observed hemispheric mean temperature anomalies associated with these events indicates that external forcing must have been involved. Essentially the unforced climatic system is unable to sustain the generation of long-term climatic anomalies.  相似文献   

Comparison of TL multiple aliquot, single grain GLSL SAR and C-14 ages for the Puritjarra, Australia, rock shelter     

J.R. Prescott  F.M. Williams  C.D. Hunt 《Quaternary Geochronology》2007,2(1-4):344-349

We report single-grain quartz luminescence ages for the Puritjarra rock shelter, with the aim of resolving an apparent discrepancy between ages obtained by ¹⁴C and a variety of luminescence methods, previously reported. Ages now found at all depths to 75 cm (ages to 30 ka) can be interpreted as largely resolving the differences. This implied caveat arises because single-grain methods are statistically inefficient. As a consequence, a degree of interpretation is inevitable in analysing the data. The emphasis in the present paper is an analysis making use of weighted histograms. The measurements by single grain OSL and ¹⁴C, including ABOX–SC, taken together, can be regarded as compatible. They indicate human occupation of the Puritjarra rock shelter at least as early as 30 ka BP.  相似文献   

Effects of solar activity on the earth's atmosphere and biosphere: M.N. Gnevyshev and A.I. Ol (Editors). John Wiley & Sons,Ltd., Chichester,UK £ 21.45     

G. Hunt 《Physics of the Earth and Planetary Interiors》1979,18(3):248-249

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Using Stable Isotopes of Water and Strontium to Investigate the Hydrology of a Natural and a Constructed Wetland   总被引：3，自引：0，他引：3  

Randall J. Hunt  Thomas D. Bullen  David P. Krabbenhoft  Carol Kendall 《Ground water》1998,36(3):434-443

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Voting power in the E.E.C.'s council of ministers: An essay on method in political geography     

R.J. Johnston  A.J. Hunt 《Geoforum》1977,8(1):1-9

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Turbulence Spectra for Boundary-Layer Winds in Tropical Cyclones: A Conceptual Framework and Field Measurements at Coastlines     

Lixiao Li  Ahsan Kareem  Julian Hunt  Yiqing Xiao  Chaoying Zhou  Lili Song 《Boundary-Layer Meteorology》2015,154(2):243-263

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Use of the L2C signal for inversions of GPS radio occultation data in the neutral atmosphere   总被引：1，自引：0，他引：1  

S. V. Sokolovskiy  W. S. Schreiner  Z. Zeng  D. C. Hunt  Y.-H. Kuo  T. K. Meehan  T. W. Stecheson  A. J. Mannucci  C. O. Ao 《GPS Solutions》2014,18(3):405-416

Results from processing FORMOSAT-3/COSMIC radio occultations (RO) with the new GPS L2C signal acquired both in phase locked loop (PLL) and open loop (OL) modes are presented. Analysis of L2P, L2C, and L1CA signals acquired in PLL mode shows that in the presence of strong ionospheric scintillation not only L2P tracking, but also L1CA tracking often fails, while L2C tracking is most stable. The use of L2C improves current RO processing in the neutral atmosphere mainly by increasing the number of processed occultations (due to significant reduction in the number of L2 tracking failures) and marginally by a reduction in noise in statistics. The latter is due to the combination of reduced L2C noise (compared to L2P) and increased L1CA noise in those occultations where L2P would have failed. This result suggests application of OL tracking for L1CA and L2C signals throughout an entire occultation to optimally acquire RO data. Two methods of concurrent processing of L1CA and L2C RO signals are considered. Based on testing of individual occultations, these methods allow: (1) reduction in uncertainty of bending angles retrieved by wave optics in the lower troposphere and (2) reduction in small-scale residual errors of the ionospheric correction in the stratosphere.  相似文献