Abstract Palaeoclimatic reconstructions from sediment cores of the Arabian Sea, Bay of Bengal, and other terrestrial ecosystems including lakes, peatlands and proglacial areas from the Indian subcontinent have been used to understand the past Indian Summer Monsoon (ISM) variability. The core monsoon zone (CMZ) of India is one of the most important regions to understand past ISM dynamics. Pollen based palaeoclimatic reconstructions in the CMZ of India suggest a progressive increase in the ISM during the Holocene. However, the results suggesting a weak ISM after the Younger Dryas (YD) cooling event are contrary to the observations made in other parts of the country. Besides this, the minor climatic fluctuations are difficult to find in most of the reconstructions. This may be attributed to poor sample resolution and chronological control. These limitations make it difficult to ascertain whether the response of vegetation to climatic change has been insignificant or whether this change is not reflected in the proxy (proxy response). As a consequence, we argue that pollen based palaeoclimatic reconstructions are one of the most widely used proxies and will be meaningful as backbone for climate models only if the reconstructions become more quantitative.

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来自印度核心季风区的全新世印度夏季风变异性，基于花粉的评论

摘要 阿拉伯海、孟加拉湾和其他陆地生态系统（包括来自印度次大陆的湖泊、泥炭地和冰前区）的沉积物核心的古气候重建已被用于了解过去的印度夏季风 (ISM) 变化。印度的核心季风区 (CMZ) 是了解过去 ISM 动态的最重要地区之一。印度 CMZ 中基于花粉的古气候重建表明 ISM 在全新世期间逐渐增加。然而，表明新仙女木 (YD) 冷却事件后 ISM 较弱的结果与该国其他地区的观察结果相反。除此之外，在大多数重建中很难发现轻微的气候波动。这可能归因于较差的样本分辨率和时间顺序控制。这些限制使得很难确定植被对气候变化的响应是否微不足道，或者这种变化是否没有反映在代理（代理响应）中。因此，我们认为基于花粉的古气候重建是最广泛使用的代理之一，并且只有当重建变得更加定量时，才会作为气候模型的支柱才有意义。