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Multi-User Equipment approved in grant 2016/02018-2: COS monitor

Grant number: 19/03816-8
Support type:Multi-user Equipment Program
Duration: April 01, 2019 - March 31, 2026
Field of knowledge:Physical Sciences and Mathematics - Geosciences
Principal Investigator:Luciana Vanni Gatti
Grantee:Luciana Vanni Gatti
Home Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia, Inovações e Comunicações (Brasil). São José dos Campos , SP, Brazil
Associated research grant:16/02018-2 - Interannual variation of Amazon Basin greenhouse gas balances and their controls in a warming and increasingly variable climate – Carbam: the Amazon carbon balance long-term study, AP.PFPMCG.TEM
EMU web page: Página do Equipamento Multiusuário não informada
Use scheduling: E-mail de agendamento não informado

Abstract

We propose to determine the fate of the carbon sink and methane source of the Amazon Basin in a period during which the Basin is likely to experience a warming and increasingly variable climate, as well as increasing direct human pressure. This will be done primarily by regularly measuring vertical profiles of atmospheric greenhouse gas concentrations over the Basin. Our previous work, published recently in Nature (Gatti et al., 2014), demonstrated that the Amazonian carbon balance is sensitive to dry versus wet years. The limited period covered by our data does, however, not yet permit to tell us what the Amazon Basin carbon balance will be in the decades to come. Our proposed strategy is therefore to continue the proven method of regular basin-wide vertical profile greenhouse gas measurements, and expand it with important new capabilities. First, we will add COS and 13CO2 to our existing suite of measured gases, which will permit an improved understanding of unusually dry and hot conditions on forest functioning. Furthermore we propose to complement the vertical bi-weekly profile sampling with continuous greenhouse gas measurements at three towers. Data analysis will rely on two high resolution regional models (CCAT-BRAMS and WRF) two global models (TOMCAT and TM5), state of the art land vegetation models (SIB4 and VPRM) to simulate CO2, COS and 13CO2, and three state-of-the-art inverse modeling approaches (Lagrangian, 4D-variational, and ensemble based) available via the partners. Together, these multiple approaches will give us a realistic assessment of the uncertainties of our Amazon Basin greenhouse balance estimates, as well as their trends and controls in a warming world and thereby an assessment of state and changes of the Amazon forests.General Goalsa) To determine Amazon Basin greenhouse gas balances (CO2, CH4 and N2O) based on one decade of large-scale atmospheric observations in a warming and increasingly variable climate.b) To understand the controls responsible for observed inter-annual variation of CO2 and CH4 and N2O sources and sinks using climate data, additional atmospheric tracers (CO, COS and 13CO2), remote sensing data and vegetation models.c) To assess the effects of on-going climate change for the Amazon rainforests and their current and future role in the global carbon cycle.Expected results Amazon Basin greenhouse gas sources and sinks for one decade during a period of a changing climate.A much improved understanding of Amazon Basin ecosystem response and resilience to changing climate conditions.An assessment of the current and future role of the Amazon Basin for the global carbon cycle.A fully-functioning Amazonian greenhouse gas measurement and analysis system including vertical profiling, continuous tower and coastal surface measurements, and modeling interpretation framework. The co-interpretation of CO2 and COS measurements is an important advance in this project. (AU)