The 2nd international workshop on waves,storm surges and coastal hazards incorporating the 16th international workshop on wave hindcasting and forecasting     

Swail  Val  Alves  Jose-Henrique  Brown  Jennifer  Greenslade  Diana  Jensen  Robert 《Ocean Dynamics》2021,71(9):957-961

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Future variability of droughts in three Mediterranean catchments   总被引：3，自引：3，他引：0  

Lopez-Bustins  Joan A.  Pascual  Diana  Pla  Eduard  Retana  Javier 《Natural Hazards》2013,66(3):1405-1429

This study investigates the intensity change in typhoons and storm surges surrounding the Korean Peninsula under global warming conditions as obtained from the MPI_ECHAM5 climate model using the A1B series. The authors use the Cyclostationary Empirical Orthogonal Function to estimate future background fields for typhoon simulations from twenty-first-century prediction results. A series of numerical experiments applies WRF (Weather Research and Forecasting) and POM (Prinston Ocean Model) models to simulate two historical typhoons, Maemi (2003) and Rusa (2002), and associated storm surges under real historical and future warming conditions. Applying numerical experiments to two typhoons, this study found that their central pressure dropped about 19 and 17 hPa, respectively, when considering the future sea surface temperature (a warming of 3.9 °C for 100 years) over the East China Sea (Exp. 1). The associated enhancement of storm surge height ranged from 16 to 67 cm along the southern coast of the Korean Peninsula. However, when the study considered global warming conditions for other atmospheric variables such as sea-level pressure, air temperature, relative humidity, geopotential height, and wind in the typhoon simulations (Exp. 2), the intensities of the two typhoons and their associated surge heights scarcely increased compared to the results of Exp. 1. Analyzing projected atmospheric variables, the authors found that air temperatures at the top of the storm around 200 hPa increased more than those at the surface in tropical and mid-latitudes. The reduced vertical temperature difference provided an unfavorable condition in the typhoon’s development even under conditions of global warming. This suggests that global warming may not always correlate with a large increase in the number of intense cyclones and/or an increase in associated storm surges.  相似文献   

Recent literature in cartography and geographic information science     

Michael P. Finn  Diana Thunen 《制图学和地理信息科学》2013,40(3):286-304

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Recent literature in cartography and geographic information science     

Michael P. Finn  Diana Thunen 《制图学和地理信息科学》2013,40(2):179-192

The National Imagery and Mapping Agency (NIMA) is at the forefront of using the techniques of Interferometric Synthetic Aperture Radar (IFSAR) for the production of large volumes of digital elevation models. Two NIMA-sponsored programs, one space- borne and one air-borne, have had very positive results in 2002. These are the Shuttle Radar Topography Mission (SRTM) and the Geographic Synthetic Aperture Radar (GeoSAR).  相似文献   

Defining the Bull'S Eye: Satellite Imagery-Assisted Slum Population Assessment in Hyderabad,India     

Oleksandr Kit  Matthias Lüdeke  Diana Reckien 《Urban geography》2013,34(3):413-424

Abstract

This paper presents an approach to qualitative and spatial assessment of slum population numbers in Hyderabad, India using circle-based population data from the Census of India and results of the analysis of high resolution QuickBird satellite image data (2003) derived from automatic line detection and lacunarity algorithm. This approach provides plausible and spatially explicit aggregate statistics of slum population numbers within the city. This work suggests that both over- and underreporting of slum population numbers does occur in Hyderabad, and provides an improved view on the slum distribution patterns within this urban agglomeration.  相似文献   

Pair annihilation and radio emission from galactic jet sources: the case of Nova Muscae     

Christian R.Kaiser  Diana C.Hannikainen 《Monthly notices of the Royal Astronomical Society》2002,330(1):225-231

In the hard X-ray spectra of some X-ray binaries line features at around 500 keV are detected. We interpret these as arising from pair annihilation in relativistic outflows leading to a significant Doppler shift of the frequencies of the lines. We show how this can be used to accurately determine the bulk velocity and orientation to the line of sight of the outflows. Constraints on the energy requirements of such outflows are also derived. Furthermore, we show that a small fraction of pairs escaping the annihilation region may give rise to the radio synchrotron emission observed in some of these objects. We apply these ideas to the hard X-ray and radio observations of Nova Muscae 1991. In this object, the energy requirements seem to rule out a large proton fraction in the outflows.  相似文献   

The local submillimetre luminosity functions and predictions from Spitzer to Herschel     

Stephen Serjeant  Diana Harrison 《Monthly notices of the Royal Astronomical Society》2005,356(1):192-204

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First experimental studies of large samples of gas-laden amorphous “cometary” ices     

Akiva Bar-Nun  Diana Laufer 《Icarus》2003,161(1):157-163

In a unique machine, the first of its kind, large (200 cm² × 10 cm) samples of gas-laden amorphous ice were prepared at 80 K and 10⁻⁵ Torr. The sample consisted of a fluffy agglomerate of 200-μm ice grains, similar to what is presumed to be the structure of comet nuclei. The sample was heated from above by IR radiation. The properties studied were gas content in the ice and its emanation from the ice upon warming and bearing on the gas/water vapor ratio observed in cometary comae vs this ratio in cometary nuclei and the effect of internal trapped gas on the thermal conductivity of the ice and the density and mechanical properties of pure ice vs gas-laden ice. These findings might have significance for the interpretation of comet observations, the forthcoming ESA’s Rosetta space mission to Comet 46P/Wirtanen in 2012, and to other comet missions.  相似文献   

The reliability of single precision computations in the simulation of deep soil heat diffusion in a land surface model     

Richard Harvey  Diana L. Verseghy 《Climate Dynamics》2016,46(11-12):3865-3882

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Monitoring recovery after earthquakes through the integration of remote sensing,GIS, and ground observations: the case of L’Aquila (Italy)     

Diana Contreras  Thomas Blaschke  Dirk Tiede  Marianne Jilge 《制图学和地理信息科学》2016,43(2):115-133

The usefulness of remote sensing (RS), geographical information systems, and ground observations for monitoring changes in urban areas has been demonstrated through many examples over the last two decades. Research has generally focused on the relief phase following a disaster, but we have instead investigated the subsequent phases involving early recovery, recovery, and development. Our aim was to determine to what extent integration of the available tools, techniques, and methods can be used to efficiently monitor the progress of recovery following an earthquake. Changes in buildings within the Italian city of L’Aquila following the 2009 earthquake were identified from Earth observation data and are used as indicators of progress in the recovery process. These changes were identified through (1) visual analysis, (2) automated change detection using a set of decision rules formulated within an object-based image analysis framework, and (3) validation based on a combination of visual and semiautomated interpretations. An accuracy assessment of the automated analysis showed a producer accuracy of 81% (error of omission: 19%) and a user accuracy of 55% (error of commission: 45%). The use of RS made it possible for the identification of changes to be spatially exhaustive, and also to increase the number of categories used for a recovery index. In addition, using RS allowed the area requiring extensive fieldwork (to monitor the progress of the recovery process) to be reduced.  相似文献