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Article
Open AccessMethod to measure tree-ring width, density, elemental composition, and stable carbon and oxygen isotopes using one sample
Tree-ring width (RW), density, elemental composition, and stable carbon and oxygen isotope (δ13C, δ18O) are widely used as proxies to assess climate change, ecology, and environmental pollution; however, a specif...
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Article
Open AccessAssessments of tree-ring intra-annual δ18O record for reconstructing hydroclimate with high temporal resolution
Tree-ring cellulose oxygen isotopic ratios have been widely studied as a hydrological proxy in monsoonal Asia. There has been, however, little attempt to perform proxy assessment of the intra-annual isotopic d...
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Article
Open AccessAsian-Australian summer monsoons linkage to ENSO strengthened by global warming
The El Niño-Southern Oscillation (ENSO) used to affect the Asian summer monsoon (ASM) and Australian summer monsoon (AusSM) precipitation in different ways but global warming may have changed it. This study bu...
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Article
Open AccessSynchronizations of tree-ring δ18O time series within and between tree species and provinces in Korea: a case study using dominant tree species in high elevations
The current study was initiated to test the synchronizations of tree-ring δ18O (hereafter δ18OTR) time series within and between tree species and provinces, which are about 144 km apart from each other in Korea. ...
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Article
Open AccessA 338-year tree-ring oxygen isotope record from Thai teak captures the variations in the Asian summer monsoon system
A 338-year oxygen isotope record from teak tree-ring cellulose collected from Mae Hong Son province in northwestern Thailand was presented. The tree-ring series preserves the isotopic signal of the regional we...
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Article
Climate variability over the past 100 years in Myanmar derived from tree-ring stable oxygen isotope variations in Teak
We present a 100-year oxygen isotope record from teak tree-ring cellulose (δ18O), originating from a site in southern Myanmar that preserves the isotopic ratios of the regional wet season’s rainfall. Tree-ring δ1...
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Article
East Asian Summer Monsoon moisture sustains summer relative humidity in the southwestern Gobi Desert, China: evidence from δ18O of tree rings
The dominant climate-controlling system of the southwestern Gobi Desert and its surrounding areas in China at interannual to centennial time scale has not been determined. It is necessary to improve our unders...
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Article
Sampling strategy and climatic implication of tree-ring cellulose oxygen isotopes of Hippophae tibetana and Abies georgei on the southeastern Tibetan Plateau
The tree-ring cellulose oxygen isotopes (δ18O) for four trees of Hippophae tibetana and four trees of Abies georgei growing in different locations around the terminal moraine in **ncuo from 1951 to 2010 were meas...
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Article
Early summer precipitation in the lower Yangtze River basin for AD 1845–2011 based on tree-ring cellulose oxygen isotopes
Precipitation from June to August is generally used to reflect the East Asian summer monsoon (EASM) variability. However, the principal modes of the EASM rainfall are different between May–June (MJ) and July–A...
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Article
Open AccessRelationship between the Northern Pacific Gyre Oscillation and tree-ring cellulose oxygen isotopes in northeastern Japan
The North Pacific Gyre Oscillation (NPGO) significantly imprints on hydrological fluctuations of the East Asian summer monsoon (EASM) region, but this has not yet been observed in proxy-based hydroclimate reco...
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Article
Open AccessRecent enhancement of central Pacific El Niño variability relative to last eight centuries
The far-reaching impacts of central Pacific El Niño events on global climate differ appreciably from those associated with eastern Pacific El Niño events. Central Pacific El Niño events may become more frequen...
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Article
Inter- and intra-annual tree-ring cellulose oxygen isotope variability in response to precipitation in Southeast China
Compared with annual tree-ring cellulose δ 18 O, intra-annual cellulose δ 18 ...
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Article
A multi-proxy reconstruction of spatial and temporal variations in Asian summer temperatures over the last millennium
To investigate climate variability in Asia during the last millennium, the spatial and temporal evolution of summer (June–July–August; JJA) temperature in eastern and south-central Asia is reconstructed using ...
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Article
Vertical segregation and population structure of ontogenetically migrating copepods Neocalanus cristatus, N. flemingeri, N. plumchrus, and Eucalanus bungii during the ice-free season in the Sea of Okhotsk
The Sea of Okhotsk is a semi-enclosed marginal sea of the subarctic North Pacific. One of the prominent characteristics of this area is the fast ice coverage during winter and early spring. We investigated the...
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Article
Tree-ring reconstructed summer temperature anomalies for temperate East Asia since 800 C.E.
We develop a summer temperature reconstruction for temperate East Asia based on a network of annual tree-ring chronologies covering the period 800–1989 C.E. The East Asia reconstruction is the regional average...
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Article
Comparison of the dryness/wetness index in China with the Monsoon Asia Drought Atlas
It is not clear how the frequency and amplitude of droughts have varied over the past 500 years in China, as the instrumental record is too short to identify centennial-scale trends. While the Monsoon Asia Dro...
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Introduction
From the academic viewpoint, we can divide the biosphere—the thin layer supporting life on Earth—into the atmosphere, land and oceans. For each of these, specific fields of science have been established over t...
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Article
Processes influencing iron distribution in the coastal waters of the Tsugaru Strait, Japan
We report measurements of iron, nutrients, dissolved oxygen, humic-type fluorescence intensity and chlorophyll a concentrations in the coastal waters at the inflow (western) and outflow (eastern) ends of Tsugaru ...
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Article
Cycladophora davisiana (Radiolaria) in the Okhotsk Sea: A key for reconstructing glacial ocean conditions
Cycladophora davisiana, a radiolarian species dwelling at mesopelagic depths, is known as a representative glacial fauna due to its unique distribution during glacial periods. In the present ocean, abundant produ...
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Article
Nitrate-nitrogen isotopic patterns in surface waters of the western and central equatorial pacific
To understand the processes transporting nitrate to the surface layer of the western and central equatorial Pacific, we measured the nitrogen isotopic ratio of nitrate (δ 15NO ...
