Lake Volume Monitoring from Space

Monitoring the water balance of Lake Victoria, East Africa, from space

Using satellite gravimetric and altimetric data, we examine trends in water storage and lake levels of multiple lakes in the Great Rift Valley region of East Africa for the years 2003–2008. GRACE total water storage estimates reveal that water storage declined in much of East Africa, by as much as 60 mm year, while altimetric data show that lake levels in some large lakes dropped by as much as ...

Monitoring open-ocean deep convection from space

Monitoring the Urban Environment from Space

Monitoring spatiotemporal changes in large urban agglomorations will become increasingly important as the number and proportion of urban residents continue to increase. The synoptic view of urban landcover provided by satellite and airborne sensors is an important complement to in situ measurements of physical, environmental and socioeconomic variables in urban settings. The 10 to 80 m spatial ...

Atmospheric CO(2) monitoring from space.

A spectroscopic method of monitoring the atmospheric CO(2) mixing ratio vertical profile from space is described. An experimental design is presented for a solar occultation mode with the O(2)A band in the visible region to retrieve pressure and temperature profiles first, and then several CO(2) bands in the infrared region at 4.3, 2.7, and 2.0 mum to obtain CO(2) mixing ratio profiles. Instrum...

Discreteness of the volume of space from Bohr-Sommerfeld quantization.

A major challenge for any theory of quantum gravity is to quantize general relativity while retaining some part of its geometrical character. We present new evidence for the idea that this can be achieved by directly quantizing space itself. We compute the Bohr-Sommerfeld volume spectrum of a tetrahedron and show that it reproduces the quantization of a grain of space found in loop gravity.