What role do biologically produced sulfur gases play in glacial climate fluctuations?
What will be an ideal response?
Dimethyl sulfide (DMS) is a gas produced by phytoplankton that leads to climate change. DMS reacts to produce aerosols in the atmosphere that can act as cloud condensation nuclei, thus assisting in cloud formation. The formation of these clouds leads to lower surface temperatures by increasing the albedo of the Earth.
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In what region of Sub-Saharan Africa is desertification most severe?
A) the Kalahari B) the Sahel C) the Congo D) the Horn of East Africa E) South Africa
Compare an air mass over the hot, arid Sahara with an average specific humidity of 12 g/kg, to an air mass in the moist midlatitudes with an average of 6 g/kg specific humidity.
a) What is the relative humidity of a 40°C air mass with 12 g/kg specific humidity? b) What is the relative humidity of a 10°C air mass with 6 g/kg specific humidity?
In San Francisco's Marina district in 1989, some fill underwent permanent deformation and settling, and some formed slurries as underground water and loose sediment flowed like a fluid in a process known as ________.
A. avulsion B. plasticity C. slumping D. creep E. liquefaction
The rock shown here, with sediment just visible to the naked eye, is a
A) sandstone.
B) shale.
C) conglomerate.