Macronutrients persist in the surface layer of the equatorial Pacific Ocean because the production of phytoplankton is limited; the nature of this limitation has yet to be resolved. Measurements of photosynthesis as a function of irradiance (P-I) provide information on the control of primary productivity, a question of great biogeochemical...
‘Lewis’ is a hazelnut cultivar developed by Oregon State University and released in January 1997. This cultivar is precocious, and it is more productive and has a smaller tree size than ‘Barcelona.’ Harvest is earlier than for ‘Barcelona,’ and the nuts have fewer defects.
A multispectral optical sensor collects data at select wavebands or channels. An example is the Sea-viewing Wide-Field-of-view Sensor (SeaWiFS) ocean color satellite, which measures eight wavebands between 402 and 885 nm (20-40 nm bandwidth with peaks centered around 412, 443, 490, 510, 555, 670, 765, and 865 nm). Optical oceanographers...
The temporal and spatial characteristics of the plume produced
by a laser microprobe, are dependent upon the composition and pressure
of the atmosphere surrounding it. It has been shown that certain atmospheres
can enhance the analytical signal by increasing the free
atom lifetime.
Improvements were made to the existing laser...