Centennial to millennial scale climate change and low-latitude oxygen minimum conditions (A06)

我们研究了热带南太平洋东部从末次冰期到前人类活动晚期全新世，在明显不同的气候条件下，导致氧最小区(OMZ)变化的控制机制。这是将人类引起的扰动与自然气候变化引起的扰动区分开来的先决条件。为此，我们一方面将以过去5000年来最高的时间分辨率重建其中心的OMZ强度的变化，另一方面将基于成熟的氧化还原敏感指标来研究过去20,000年来敏感的亚氧OMZ边缘的变化。

We study the control mechanisms that caused changes in the Oxygen Minimum Zone (OMZ) in the eastern tropical South Pacific under significantly different climatic conditions from the last Glacial to the pre-anthropogenic Late Holocene. This is a prerequisite to separate human-induced perturbations from those caused by natural climate variability. For this purpose we will on one hand reconstruct variations in OMZ intensity in its centre at highest time resolution for the past 5,000 years and on the other investigate changes in the sensitive suboxic OMZ margins for the past 20,000 years based on well-established redox-sensitive proxies.