Sabbatical for six months at the JRC in Ispra/Italy for (1) measurement of NH3 and other trace gases in the atmosphere in a region with very variable and high NH3 values (2) to intensify the cooperation with the JRC

这项提议的目的是资助在意大利北部伊斯普拉的联合研究中心停留，作为休假的一部分。在六个月的停留期间，将使用红外太阳吸收光谱(FTIR光谱)测量对流层微量气体的可变性。太阳吸收光谱可以同时测量大约20种大气痕量气体的浓度。这些气体包括对流层微量气体CO、C2H6、C2H2、CH2O、HCN、OCS、NH3和H2O。该项目的重点是NH3的测量，这是一种迄今尚未详细研究的痕量气体。测量得到了大约两层大气中NH3的总柱浓度和垂直分布。FTIR测量得到了对Ispra 100米高的塔楼的现场测量和当地EMEP站的现场测量的补充。卫星测量表明，意大利北部的NH3浓度很高，变化很大。通过FTIR测量以及在Tall Tower站和EMEP站的现场观测了解各种其他痕量气体的浓度，有助于更好地了解非常复杂和部分耦合的化学和动力学过程。这些观测结果提高了我们对大气NH3变异性的认识，并为理解大气NH3收支提供了有价值的信息。此外，这些测量结果还可用于卫星和模型验证。休假将有助于加强与伊斯普拉司法与和解委员会的合作。

The aim of the proposal is to finance a stay at the Joint Research Center in Ispra / northern Italy as part of a sabbatical. During the six-month stay ) the variability of tropospheric trace gases will be measured using the solar absorption spectroscopy in the infrared (FTIR spectroscopy). The solar absorption spectroscopy allows the simultaneous measurement of the concentrations of about 20 atmospheric trace gases. These include the tropospheric trace gases CO, C2H6, C2H2, CH2O, HCN, OCS, NH3 and H2O. The focus of the project are measurement of NH3, a trace gas which has not been studied in detail so far. The measurements yield the total column concentrations and the vertical profiles of NH3 in about two layers of the atmosphere. The FTIR measurements are complemented by in-situ measurements on the 100 m high Tall Tower in Ispra and by in-situ measurements at the local EMEP station.Satellite measurements indicate high concentrations and great variability of NH3 in northern Italy. Knowing the concentrations of a variety of other trace gases by the FTIR measurements, and the in-situ observations at the Tall Tower Station and the EMEP station, enables a better understanding of the very complex and partially coupled chemical and dynamical processes. The observations allow improving our knowledge on the variability of atmospheric NH3, and provide valuable information for understanding the atmospheric NH3 budget. Furthermore, the measurements serve for satellite and model validation. The sabbatical will serve to intensify the cooperation with the JRC in Ispra.