Collaborative Research: HIAPER Pole-to-Pole Observations (HIPPO) of Carbon Cycle and Greenhouse Gases

确定温室气体的增加和分布特征的必要性是大气成分和气候界的首要科学目标。 HIAPER极对极观测（HIPPO）计划将通过对流层整个深度的垂直剖面提供全球、纬向覆盖，从而能够闭合和反演关键温室气体（例如二氧化碳、一氧化碳和甲烷）的全球收支以及相关的长寿命示踪剂和比率（例如氧/氮比、O2/N2）。 这套化学测量，从80 N到70 S，并重复了大约六个月的时间间隔，将提供一个独特的和明确的数据集，用于反演和其他全球模拟分析的碳循环gas.Observed温室气体浓度的半球梯度是至关重要的，我们有能力预测的碳气体的人为排放的命运。 以前的化学传输模拟研究用于推断CO2的表面通量，源和汇已被普遍限制使用边界层CO2浓度。 因此，现场实验将利用HIAPER G-V飞机平台为大气科学界提供的新的变革能力。这项工作得到了NSF地球系统碳和水征集的支持，这是地球科学理事会的跨学科资助机会。

The need to characterize the increase and distribution of greenhouse gases is a first order scientific goal of the atmospheric composition and climate communities. The HIAPER Pole-to-Pole Observations (HIPPO) program will provide global, meridional coverage, via vertical profiles throughout the depth of the troposphere enabling closure and inversion of global budgets of critical greenhouse gases (e.g. carbon dioxide, CO2; carbon monoxide, CO; and methane, CH4), and related long-lived tracers and ratios (e.g. the oxygen/nitrogen ratio, O2/N2). This suite of chemical measurements, made from 80 N to 70 S, and repeated over approximately six monthly intervals, will provide a unique and definitive data set, to be used in inversion and other global modeling analyses of carbon cycle gases.Observed gradients in the hemispheric concentrations of greenhouse gases are critical to our ability to predict the fate of anthropogenic emissions of carbon gases. Previous chemical transport modeling studies used to infer CO2 surface fluxes, sources and sinks have been generally constrained to using boundary layer CO2 concentrations. The field experiments will thus take advantage of transformative capabilities newly available to the atmospheric science community provided by the use of the HIAPER G-V aircraft platform.This work is supported under the NSF Carbon and Water in the Earth System solicitation, an interdisciplinary funding opportunity from the Directorate of Geosciences.