A Data Warehouse is a centralized repository of data acquired from external data sources and organized following a multidimensional model (Inmon, 1996) in order to be analyzed by On-Line Analytical Processing (OLAP) applications. OLAP tools provide the ability to interactively explore multidimensional data presenting detailed and aggregated data. The results of analyses are the basis of strateg...

Black carbon aerosols and the third polar ice cap S. Menon, D. Koch, G. Beig, S. Sahu, J. Fasullo, and D. Orlikowski Lawrence Berkeley National Laboratory, Berkeley, CA, USA Columbia University/NASA GISS, New York, NY, USA Indian Institute for Tropical Meteorology, Pune, India Climate Analysis Section, CGD/NCAR, Boulder, CO, USA Lawrence Livermore National Laboratory, Livermore, CA, USA Receive...

The processing of multi-dimensional range queries involving spatial relations arises in many application areas including Spatial Databases and GISs. In this paper we show how a variety of threeor four-dimensional queries that correspond to different relations can be processed using spatial data structures. We provide analytical formulas that describe the expected cost of retrieval and test the ...

In this paper we present a new multimodal locomotion user interface that enables users to travel through 3D environments displayed in geospatial information systems (GISs), e.g., Google Earth or Microsoft Virtual Earth. When using the proposed interface the geospatial data can be explored immersively using stereoscopic visualization on a head-mounted display (HMD). When using certain tracking a...

The way people conceptualize space is an important consideration for the design of geographic information systems, because a better match with peopleÕs thinking is expected to lead to easier-touse information systems. Everyday space, the basis to geographic information systems (GISs), has been characterized in the literature as being either small-scale (from table-top to room-size spaces) or la...

Results from a series of Goddard Institute for Space Studies (GISS) General Circulation Models (GCMs) are used to assess climate variability in the pre-anthropogenic Holocene, the interval following the end of the last glacial beginning roughly 11.5 kyr BP. In particular, we focus on the forced aspects of this variability. The principle forcings are orbital, solar, volcanic and events (such as ...

Currently, little is known on how volcanic eruptions impact large-scale climate phenomena such as South American paleo-Intertropical Convergence Zone (ITCZ) position and summer monsoon behavior. In this paper, an analysis of observations and model simulations is employed to assess the influence of large volcanic eruptions on the climate of tropical South America. This problem is first considere...

[1] Aerosol indirect effects (AIE) are a principal source of uncertainty in future climate predictions. The present study investigates the equilibrium response of the climate system to present‐day and future AIE using the general circulation model (GCM), Goddard Institute for Space Studies (GISS) III. A diagnostic formulation correlating cloud droplet number concentration (Nc) with concentratio...

The ability of five, global coupled climate models to simulate important atmospheric circulation characteristics in the Southern Hemisphere for the period 1960–1999 is assessed. The circulation features examined are the Southern Hemisphere annular mode (SAM), the semi-annual oscillation (SAO) and the quasi-stationary zonal wave 3 (ZW3). The models assessed are the National Center for Atmospheri...

A new aerosol microphysical module MATRIX, the Multiconfiguration Aerosol TRacker of mIXing state, and its application in the Goddard Institute for Space Studies (GISS) climate model (ModelE) are described. This module, which is based on the quadrature method of moments (QMOM), represents nucleation, condensation, coagulation, internal and external mixing, and cloud-drop activation and provides...