MFV3D Book Archive > Theory > Download Ocean Colour: Theory and Applications in a Decade of CZCS by R. W. Austin (auth.), Vittorio Barale, Peter M. PDF

Download Ocean Colour: Theory and Applications in a Decade of CZCS by R. W. Austin (auth.), Vittorio Barale, Peter M. PDF

By R. W. Austin (auth.), Vittorio Barale, Peter M. Schlittenhardt (eds.)

Optical distant sensing is of important assist in figuring out the marine atmosphere and its biogeochemical and actual methods. The Coastal region colour Scanner (CZCS), which operated on board the Nimbus-7 satellite tv for pc from overdue 1978 to early 1986, has been the most resource of ocean color facts. a lot paintings has been dedicated to CZCS facts processing and research strategies through the Nineteen Eighties. After a decade of expertise, the productiveness of the worldwide Ocean (PGO) job - which used to be confirmed within the framework of the foreign area 12 months 1992 (ISY '92) via SAFISY, the distance organisation discussion board of ISY - subsidized a workshop geared toward offering a reference in ocean color technology and at selling the complete exploitation of the CZCS old information within the box of organic oceanography. the current quantity contains a chain of state of the art contributions on idea, functions and destiny views of ocean color. After an creation at the historic viewpoint of ocean color, a few articles are dedicated to the CZCS theoretical historical past, on radiative move and in-water subject matters, in addition to on calibration, atmospheric correction and pigment focus retrieval algorithms built for the CZCS. extra, a evaluate is given of significant functions of CZCS info world wide, conducted long ago decade. the next a part of the publication is established at the program of ocean color to the evaluate of marine organic details, with specific regard to plankton biomass, basic productiveness and the coupling of physical/biological types. The hyperlinks among international oceanic creation and weather dynamics also are addressed. eventually, the final part is dedicated to destiny methods and targets of ocean color technological know-how, and to deliberate sensors and structures. The e-book is needed studying for these thinking about ocean color and similar disciplines, delivering an summary of the present prestige during this box in addition to stimulating the talk on new principles and advancements for upcoming ocean color missions.

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2 using data on Ze from Yentsch (1990) and Zm from Robinson et al. (1979). (figure 8). The only area where P:R values are optimal are near the equator centered around lOON. This demonstrates that growth is light limited throughout most of the basin during winter months. 0, which is the optimal ratio, has moved northward residing between latitude 40-50oN (figure 9). At higher latitudes, the P:R analysis shows that these regions are still light limited. Utilizing oceanographic data I will attempt to predict the onset of the bloom at 40-50 oN as observed by CZCS.

It depends on the position of the earth in its orbit and is given by where D is the day of the year (D=1 on 1 Jan. ). as a function of wavelength, measured by Neckel and Labs (1984), is presented in figure 14. The equation for £(0) can be solved yielding Note that the transmittance defined earlier is given by T(eo,00) = (-0/ coseo) , and measurement of T yields 0, the optical thickness of the atmosphere. The equation for £(1) then becomes dL (1) (1) cosfJ--a;-= - L J + PL (0)' aD' (-1") =-L (1) +P ( eo' 0 0 ~e,0 ) Foexp - - caseO 51 Neckel and Labs (1984) 200 E ::t N E 150 ~ ~ 5 2: 100 0 ~ 50 0 Wavelength (nm) Figure 14.

Water vapor is not considered since ocean color sensors avoid the water vapor bands. It is seen that the aerosols provide the dominant attenuation near the surface, Rayleigh scattering above the immediate surface layer, and 03 above about 20 km. It is important to note that the aerosol profile can differ significantly from that in the figure. For example, a major volcanic eruption, such as EI ChichOn in 1982, can eject enough aerosol into the stratosphere that the aerosol, rather than 03, determines the optical properties there.

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