Below are the first 10 and last 10 pages of uncorrected machine-read text (when available) of this chapter, followed by the top 30 algorithmically extracted key phrases from the chapter as a whole.
Intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text on the opening pages of each chapter.
Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.
Do not use for reproduction, copying, pasting, or reading; exclusively for search engines.
OCR for page 53
PART II
ASSESSMENTS OF CURRENT UNDERSTANDING
Part I of this report, "A Plan For Action," presents a coordinated national blueprint for
scientific investigations of biogeochemical cycles in the global troposphere. Part II, "Assess-
ments of Current Understanding," presents much of the background information from which
the proposed Global Tropospheric Chemistry Program described in Part I was developed. Brief
authored reviews are presented in Part II, and they evaluate both the present knowledge and gaps
in the understanding of tropospheric chemical cycles and processes. Four review papers discuss
the sources, transport, transformation, and removal oftrace species in the troposphere. These are
followed by a review of the role of modeling in understanding tropospheric chemical
processes. A general review of tropospheric biogeochemical cycles is given followed by individ-
ual reviews of the water, ozone, nitrogen, sulfur, carbon, halogen, trace element, and aerosol
particle cycles. Instrumentation development needs for use of mass-balance techniques is
reviewed, and an instrument and platform survey completes the main part of Part II. Brief
bibliographies are given at the end of each review paper. These bibliographies are not intended to
be comprehensive but simply to serve as representative reference lists from which further infor-
mation can be obtained for each topic.
Appendix A presents a brief review of current tropospheric chemistry research in the United
States. In recognition of the future importance of spaceborne remote sensing techniques in
tropospheric chemistry research, a brief review of this subject is presented in Appendix B. A
matrix approach was used by our panel to systematically evaluate present knowledge of the
primary species in several of the major elemental cycles in the troposphere. These matrices are
presented in Appendix C.
OCR for page 54
Representative terms from entire chapter:
chemistry research
