As a part of the global material flow , the global dispersion of persistent organic pollutants ( POPs ) is also regulated by forests .In theory , the forest plays as a " sink " and delays the transport of POPs to remote/cold regions .For example , from a global perspective , what is the distribution of POPs in forests ? How will forest changes influence the global transport of POPs ? To answer these questions , Dr . Ping Gong from the Institute of Tibetan Plateau Research .
As the roof of the world , the Third Pole centered on the Tibetan Plateau can be easily considered a permanent presence .” pointed out by Fang , referring to the findings of the First Tibetan Plateau Expedition and Research ( FTEP ) , which was carried out ？ in 1970s as the first large scale scientific expedition ？ focusing on the Third Pole .With this recalibrated elevation history , there is still much work to do in the future . ？ https : / / advances . sciencemag . org/content / 6 / 50 / eaba7298 ？ ？ ？.
Soils on the Tibetan Plateau are extremely sensitive to global climate change .The lack of understanding of soil organic matter ( SOM ) transformation processes in this region hinders the prediction of SOM stocks under future climate conditions .Recently , Prof . Gengxin Zhang ’ s group of Institute of Tibetan Plateau Research , Chinese Academy of Sciences studied the responses of the alpine SOM to global climate change , including Nitrogen ( N ) deposition , warming and increased precipitation .
The Nam Co , situated within the south-central Tibetan Plateau ( 30 ° – 35 ° N ) , is located at the transitional region between the Indian summer monsoon and westerlies in the growing season .This area with an elevation above 4700 m a . s . l . is characterized by extremely cold and dry treeless environment .Among alpine shrubs , Wilson juniper ( Juniperus pingii var . wilsonii ) is widespread throughout the south-central Tibetan Plateau . ？.
The modern environment of southern China is dominated by a humid monsoon climate , and presents a striking contrast to the widespread deserts found at similar latitudes elsewhere .Comparison of Paleogene palynological records of southern China , with global climate change expressed by deep-sea δ 18O records ( modified from Zachos et al . , and tectonic events ( Wang et al . .
The rare biosphere contains microorganisms that present in low abundance .These rare microorganisms represent the majority of the Earth ' s biodiversity and are responsible for ecosystem multifunctionality and act as the “ seed bank ” during ecological restoration .However , the diversity and biogeography of rare microorganisms are still poorly understood in the terrestrial ecosystem .Fig . 4 Correlations between the community composition and phylogeny for rare and abundant bacteria ？.
Although biodiversity and ecosystem functions are strongly shaped by contemporary environments , such as climate , local biotic and abiotic attributes , we know relatively little about how they change along with long-term geological processes .The integration of geological processes with environmental gradients could enhance our understanding of biodiversity and ecosystem functioning across different climatic zones . ？ ？ Further studies are encouraged to study the legacies of past geological events on biological communities and ecosystem functions .
Chinese Academy of Sciences has led a study to image the small-scale structure of the D ' ' layer beneath the India-Eurasian plate collision zone . ？ ？ This study is mainly based on the waveform data of eight earthquakes in the Indian Ocean recorded by the dense China Digital Seismic Network ( Figure 1b ) .The median value of δ t3D is - 1.75 s and 95% of the values fall between - 4.57 s and + 1.63 s . ( b ) Values of dVs plotted at the CMB reflection points of ScS . ( c ) Map of dVs after cap smoothing using caps with radii of 2o and cap centers spaced every 0.5o .
Many researches reported that warming alters soil freeze-thaw ( F-T ) process during winter in cold regions , such as the start and end dates , frequency and intensity .And how these changes will affect the annual ecosystem respiration . ？ They found that warming delayed the start and end dates of F-T events during the freezing period , and advanced them during the thawing period .Periods ？ ？ Figure3 Mean total ecosystem respiration ( Re ) during the thawed period and annually.