Abstract
AbstractAn ice core was extracted from the Zangser Kangri (ZK) ice field in the northern Tibetan Plateau (NTP), a location with limited instrumental and proxy records. In this paper, we present a continuous high–resolution dust concentration time series spanning the period AD 1951-2008 to investigate variations in atmospheric dust loading over the NTP. The results show that atmospheric dust loading exhibited significant decadal variations, with two periods of high dust loading (AD 1959–67 and AD 1979–89) and three periods of relatively low loading (AD 1951-58, AD 1968–78 and AD 1990–2008). The variability of atmospheric dust loading was related to wind speed at 500 hPa over the dust source regions. The winter Arctic Oscillation (AO) index showed a significant negative correlation with the annual dust concentration, implying a possible connection between the winter AO and the atmospheric dust loading over the NTP.
Highlights
As one of the most abundant types of aerosol in the atmosphere, dust has recently received considerable attention due to its role in the climate system, global biogeochemical cycles, hydrologic cycles, air quality and public health (Yumimoto and others, 2010)
This paper presents a 58 year atmospheric insoluble dust deposition record (AD 1951–2008) obtained from an ice core drilled at Zangser Kangri (ZK) glacier located on the northern Tibetan Plateau (NTP) (Fig. 1)
The Arctic Oscillation (AO) is defined by process appears to be responsible for the springtime decrease in the frequency of dust storms in the Taklimakan desert during years with the strong winter AO. Another mechanism is that the winter AO can influence the intensity of the westerlies over mid- and low-latitude Eurasia and influence the atmospheric dust loading over the NTP (Han and others, 2008)
Summary
As one of the most abundant types of aerosol in the atmosphere, dust has recently received considerable attention due to its role in the climate system, global biogeochemical cycles, hydrologic cycles, air quality and public health (Yumimoto and others, 2010). This paper presents a 58 year atmospheric insoluble dust deposition record (AD 1951–2008) obtained from an ice core drilled at Zangser Kangri (ZK) glacier located on the NTP (Fig. 1).
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