Perpetual Ocean (by djxatlanta)
Ocean surface currents around the world during the period from June 2005 through Decmeber 2007. This visualization was produced using NASA/JPL’s computational model called Estimating the Circulation and Climate of the Ocean, Phase II or ECCO2. ECCO2 is high resolution model of the global ocean and sea-ice. ECCO2 attempts to model the oceans and sea ice to increasingly accurate resolutions that begin to resolve ocean eddies and other narrow-current systems which transport heat and carbon in the oceans.The ECCO2 model simulates ocean flows at all depths, but only surface flows are used in this visualization. The dark patterns under the ocean represent the undersea bathymetry. Topographic land exaggeration is 20x and bathymetric exaggeration is 40x. Credit: NASA/Goddard Space Flight Center Scientific Visualization Studio.
The image above shows the eastern part of Grand Canyon National Park in northern Arizona, near 36 degrees north latitude and 112.1 degrees west longitude. It is a composite of two pieces: a synthetic natural color image captured on July 14, 2011, draped over a three-dimensional model of the area. The images and stereoscopic data behind the model were acquired by the Advanced Thermal Emission and Reflection Radiometer (ASTER) on NASA’s Terra spacecraft. The perspective is from east to west, looking down the channel of the Colorado River. North is to the right. In this view, the canyon spans 9 miles (14.5 kilometers) at its widest point and 5,600 feet (1,707 meters) from rim to river bed. The North Rim and Walhalla Plateau stand out on the right side, while Grand Canyon Village rests on the high plateau at upper left. (vía NASA Earth Observatory)
September GSA Today cover photo: National Elevation Dataset shaded relief image of Minnesota, USA, by Paul Morin of the University of Minnesota’s Polar Geospatial Center, showing the Lake Agassiz basin (NW), an ice stream path (SW), gullies along the Mississippi (SE), and Archean terrane (NE).
TRMM Satellite Shows What’s Happening Under the Hood of Hurricane Irene’s Clouds (por NASA Goddard Photo and Video)
NASA’s Tropical Rainfall Measuring Mission (TRMM) satellite radar saw the inner core of Hurricane Irene for a fourth time on Friday afternoon, August 25. On Friday afternoon, the TRMM radar showed that the southern half of the eyewall was gone. Some strong precipitation did still exist in the remaining eyewall to the north of the eye.
Fuente: Flickr / gsfc
Delta lab experiment (by CSDMSmovie)
This movie shows an experimental delta built into standing water (constant depth of 3 cm). All external controls are constant (sediment flux, water discharge, base level changes). Fluvial system alternates between sediment release (channelization) and sediment storage (sheet flow).