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Mt. Paektu (also known as Changbaishan) is an enigmatic volcano on the border between the Democratic People's Republic of Korea (DPRK) and China. Despite being responsible for one of the largest eruptions in history, comparatively little is known about its magmatic evolution, geochronology, or underlying structure. We present receiver function results from an unprecedented seismic deployment in the DPRK. These are the first estimates of the crustal structure on the DPRK side of the volcano and, indeed, for anywhere beneath the DPRK. The crust 60 km from the volcano has a thickness of 35 km and a bulk VP/VS of 1.76, similar to that of the Sino-Korean craton. The VP/VS ratio increases ~20 km from the volcano, rising to >1.87 directly beneath the volcano. This shows that a large region of the crust has been modified by magmatism associated with the volcanism. Such high values of VP/VS suggest that partial melt is present in the crust beneath Mt. Paektu. This region of melt represents a potential source for magmas erupted in the last few thousand years and may be associated with an episode of volcanic unrest observed between 2002 and 2005.

Mt. Paektu (also known as Changbaishan) is an enigmatic volcano on the border between the Democratic People's Republic of Korea (DPRK) and China. Despite being responsible for one of the largest eruptions in history, comparatively little is known about its magmatic evolution, geochronology, or underlying structure. We present receiver function results from an unprecedented seismic deployment in the DPRK. These are the first estimates of the crustal structure on the DPRK side of the volcano and, indeed, for anywhere beneath the DPRK. The crust 60 km from the volcano has a thickness of 35 km and a bulk $V_\text{P}$/$V_\text{S}$ of 1.76, similar to that of the Sino-Korean craton. The $V_\text{P}$/$V_\text{S}$ ratio increases ~20 km from the volcano, rising to >1.87 directly beneath the volcano. This shows that a large region of the crust has been modified by magmatism associated with the volcanism. Such high values of $V_\text{P}$/$V_\text{S}$ suggest that partial melt is present in the crust beneath Mt. Paektu. This region of melt represents a potential source for magmas erupted in the last few thousand years and may be associated with an episode of volcanic unrest observed between 2002 and 2005. ; This work was supported by the Richard Lounsbery Foundation. The UK seismic instruments and data management facilities were provided under loan number 976 by SEIS-UK at the University of Leicester. The facilities of SEIS-UK are supported by the NERC under Agreement R8/H10/64. J.O.S.H. was supported by an NERC Fellowship NE/I020342/1.

The Natural Bounty of China is an important book series of 60 titles that comprehensively documents the vast diversity of China's natural resources. China recognizes more than 1,600 products unique to the country - known as geographical indication products. This series describes these products in detail, with each single volume focusing on a particular region of China and the unique products cultivated there, such as Changbaishan ginseng in northeast China to the bean paste of Pixian (the "soul of Sichuan cuisine") in the southwest. From the Tianshan Mountains in Xinjiang to history-steeped Shandong and gorgeously scenic Yunnan, almost every place in the country has produced something that is readily identifiable with it. This series not only makes a major contribution to our understanding of the geography and agriculture of China, but also gives us a greater appreciation of Chinese culture as a whole. This volume looks at the abundant resources and products of China's historic capital city, Beijing.

The Natural Bounty of China is an important book series of 60 titles that comprehensively documents the vast diversity of China's natural resources. China recognizes more than 1,600 products unique to the country - known as geographical indication products. This series describes these products in detail, with each single volume focusing on a particular region of China and the unique products cultivated there, such as Changbaishan ginseng in northeast China to the bean paste of Pixian (the "soul of Sichuan cuisine") in the southwest. From the Tianshan Mountains in Xinjiang to history-steeped Shandong and gorgeously scenic Yunnan, almost every place in the country has produced something that is readily identifiable with it. This series not only makes a major contribution to our understanding of the geography and agriculture of China, but also gives us a greater appreciation of Chinese culture as a whole. This volume looks at the abundant resources and products from the birthplace of Chinese civilization, Inner Mongolia.

The Natural Bounty of China is an important book series of 60 titles that comprehensively documents the vast diversity of China's natural resources. China recognizes more than 1,600 products unique to the country - known as geographical indication products. This series describes these products in detail, with each single volume focusing on a particular region of China and the unique products cultivated there, such as Changbaishan ginseng in northeast China to the bean paste of Pixian (the "soul of Sichuan cuisine") in the southwest. From the Tianshan Mountains in Xinjiang to history-steeped Shandong and gorgeously scenic Yunnan, almost every place in the country has produced something that is readily identifiable with it. This series not only makes a major contribution to our understanding of the geography and agriculture of China, but also gives us a greater appreciation of Chinese culture as a whole. This volume looks at the abundant resources and products of Shanghai, the 'Pearl of the Orient'.

The Natural Bounty of China is an important book series of 60 titles that comprehensively documents the vast diversity of China's natural resources. China recognizes more than 1,600 products unique to the country - known as geographical indication products. This series describes these products in detail, with each single volume focusing on a particular region of China and the unique products cultivated there, such as Changbaishan ginseng in northeast China to the bean paste of Pixian (the "soul of Sichuan cuisine") in the southwest. From the Tianshan Mountains in Xinjiang to history-steeped Shandong and gorgeously scenic Yunnan, almost every place in the country has produced something that is readily identifiable with it. This series not only makes a major contribution to our understanding of the geography and agriculture of China, but also gives us a greater appreciation of Chinese culture as a whole. This volume looks at the abundant resources and products of Tibet, the 'Roof of the World'.

Ginseng and Borderland explores the territorial boundaries and political relations between Qing China and Chosŏn Korea during the period from the early seventeenth to the late nineteenth centuries. By examining a unique body of materials written in Chinese, Manchu, and Korean, and building on recent studies in New Qing History, Seonmin Kim adds new perspectives to current understandings of the remarkable transformation of the Manchu Qing dynasty (1636–1912) from a tribal state to a universal empire. This book discusses early Manchu history and explores the Qing Empire's policy of controlling Manchuria and Chosŏn Korea. Kim also contributes to the Korean history of the Chosŏn dynasty (1392–1910) by challenging conventional accounts that embrace a China-centered interpretation of the tributary relationship between the two polities, stressing instead the agency of Chosŏn Korea in the formation of the Qing Empire. This study demonstrates how Koreans interpreted and employed this relationship in order to preserve the boundary—and peace—with the suzerain power. By focusing on the historical significance of the China-Korea boundary, this book defines the nature of the Qing Empire through the dynamics of contacts and conflicts under both the cultural and material frameworks of its tributary relationship with Chosŏn Korea.

Paektu volcano (Changbaishan) is a rhyolitic caldera that straddles the border between the Democratic People's Republic of Korea and China. Its most recent large eruption was the Millennium Eruption (ME; 23 km3 dense rock equivalent) circa 946 CE, which resulted in the release of copious magmatic volatiles (H2O, CO2, sulfur, and halogens). Accurate quantification of volatile yield and composition is critical in assessing volcanogenic climate impacts but is challenging, particularly for events before the satellite era. We use a geochemical technique to quantify volatile composition and upper bounds to yields for the ME by examining trends in incompatible trace and volatile element concentrations in crystal-hosted melt inclusions. We estimate that the ME could have emitted as much as 45 Tg of S to the atmosphere. This is greater than the quantity of S released by the 1815 eruption of Tambora, which contributed to the "year without a summer." Our maximum gas yield estimates place the ME among the strongest emitters of climate-forcing gases in the Common Era. However, ice cores from Greenland record only a relatively weak sulfate signal attributed to the ME. We suggest that other factors came into play in minimizing the glaciochemical signature. This paradoxical case in which high S emissions do not result in a strong glacial sulfate signal may present a way forward in building more generalized models for interpreting which volcanic eruptions have produced large climate impacts.

Paektu volcano (Changbaishan) is a rhyolitic caldera that straddles the border between the Democratic People's Republic of Korea and China. Its most recent large eruption was the Millennium Eruption (ME; 23 km$^{3}$ dense rock equivalent) circa 946 CE, which resulted in the release of copious magmatic volatiles (H$_{2}$O, CO$_{2}$, sulfur, and halogens). Accurate quantification of volatile yield and composition is critical in assessing volcanogenic climate impacts but is challenging, particularly for events before the satellite era. We use a geochemical technique to quantify volatile composition and upper bounds to yields for the ME by examining trends in incompatible trace and volatile element concentrations in crystal-hosted melt inclusions. We estimate that the ME could have emitted as much as 45 Tg of S to the atmosphere. This is greater than the quantity of S released by the 1815 eruption of Tambora, which contributed to the "year without a summer." Our maximum gas yield estimates place the ME among the strongest emitters of climate-forcing gases in the Common Era. However, ice cores from Greenland record only a relatively weak sulfate signal attributed to the ME. We suggest that other factors came into play in minimizing the glaciochemical signature. This paradoxical case in which high S emissions do not result in a strong glacial sulfate signal may present a way forward in building more https://symplectic.admin.cam.ac.uk/objectedit.html?cid=1&oid=876954generalized models for interpreting which volcanic eruptions have produced large climate impacts. ; K.I. was supported by the NSF under award no. 1349486 and by AAAS. Fieldwork was supported by the Richard Lounsbery Foundation.