Global synthesis of surface conditions and climate trends during the MIS11 interglacial (GLOSINT11)

海洋同位素第11阶段(MIS11)，大约40万年前，提供了与全新世最接近的模拟地球围绕太阳的轨道和由此产生的太阳辐射。由于低进动强迫，由于地球的偏心率最小，MIS11期间温室气体等其他气候因素的相对重要性可能比其他暖期更高，与没有人为影响的全新世相当。出于这些原因，MIS11是测试气候模型的一个很有前途的领域。到目前为止，可用于这种数据模型比较的古气候数据分散在文献中，MIS11没有关于地表条件和气候趋势空间模式的天气图。该项目的目的是综合现有的海洋、陆地和冰芯记录，记录整个异常漫长的MIS11间冰期的关键表面状况(温度、湿度)，并确定地表状况异常的空间和时间模式。这一综合将使我们能够测试地球表面的半球间和热带到极地的温度梯度是否可与全新世相媲美，以及MIS11期间的气候变化趋势是否与太阳辐射或温室气体强迫更一致。

Marine Isotope Stage 11 (MIS11), ~400,000 years ago, provides the nearest analog to the Holocene in terms of the configuration of the Earth’s orbit around the Sun and the resulting insolation. Because of the low precessional forcing, as the Earth’s eccentricity was at a minimum, the relative importance of other climatic factors like greenhouse gases may have been higher during MIS11 than during other warm periods and comparable to the Holocene without anthropogenic effects. For these reasons, MIS11 represents a promising ground for testing climate models. As yet, palaeoclimatic data that could be used for such data-model comparison are scattered through the literature and no synoptic picture of the surface conditions and spatial patterns of climate trends exists for MIS11. The aim of this project is to synthesize existing marine, terrestrial and ice-core records of key surface conditions (temperature, humidity) throughout the unusually long MIS11 interglacial and establish the spatial and temporal patterns of surface condition anomalies. This synthesis will allow us to test whether interhemispheric and tropical-to-pole temperature gradients at the Earth’s surface were comparable to the Holocene and whether the trends of climate change during MIS11 were more consistent with insolation or greenhouse gas forcing.