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Chemosphere

Title:		Approaches for quantifying reactive and low-volatility biogenic organic compound emissions by vegetation enclosure techniques - part A
Author(s):		Ortega J; Helmig D;
Address:		"Institute of Arctic and Alpine Research (INSTAAR), University of Colorado, Boulder, CO 80309, USA"
Journal Title:		Chemosphere
Year:		2008
Volume:		20080214
Issue:		3
Page Number:		343 - 364
DOI:		10.1016/j.chemosphere.2007.11.020
ISSN/ISBN:		0045-6535 (Print) 0045-6535 (Linking)
Abstract:		"The high reactivity and low vapor pressure of many biogenic volatile organic compounds (BVOC) make it difficult to measure whole-canopy fluxes of BVOC species using common analytical techniques. The most appropriate approach for estimating these BVOC fluxes is to determine emission rates from dynamic vegetation enclosure measurements. After scaling leaf- and branch-level emission rates to the canopy level, these fluxes can then be used in models to determine BVOC influences on atmospheric chemistry and aerosol processes. Previously published reports from enclosure measurements show considerable variation among procedures with limited guidelines or standard protocols to follow. This article reviews this literature and describes the variety of enclosure types, materials, and analysis techniques that have been used to determine BVOC emission rates. The current review article is followed by a companion paper which details a comprehensive enclosure technique that incorporates both recommendations from the literature as well as insight gained from theoretical calculations and practical experiences. These methods have yielded new BVOC emission data for highly reactive monoterpenes (MT) and sesquiterpenes (SQT) from a variety of vegetation species"
Keywords:		Air Pollutants/*analysis Butadienes/analysis Environmental Monitoring Hemiterpenes/analysis Monoterpenes/analysis Organic Chemicals/*analysis Pentanes/analysis Sesquiterpenes/analysis Volatilization;
Notes:		"MedlineOrtega, John Helmig, Detlev eng Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Review England 2008/02/19 Chemosphere. 2008 Jun; 72(3):343-64. doi: 10.1016/j.chemosphere.2007.11.020. Epub 2008 Feb 14"