1 / 14

Observation plan in NE Asia

Observation plan in NE Asia. Jun Asanuma Terrestrial Environment Research Center Tsukuba University. RAISE ( R angelands A tmosphere-Hydrosphere-Biosphere I nteraction S tudy E xperiment in Northeastern Asia). Period: 2001/12-2006/11 (Obs. 2002-: IOP 2003) Objectives:

leo-gilmore
Télécharger la présentation

Observation plan in NE Asia

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Observation plan in NE Asia Jun Asanuma Terrestrial Environment Research Center Tsukuba University

  2. RAISE (Rangelands Atmosphere-Hydrosphere-Biosphere Interaction Study Experiment in Northeastern Asia) • Period: 2001/12-2006/11 (Obs. 2002-: IOP 2003) • Objectives: • Better understandings of the interaction between hydrosphere, atmosphere in the targeted region, and biosphere and human impact on it. • Target Area: upper Kherlen river basin

  3. Observations; tower flux forest(larch forest) • Radiation, water/heat/carbon budget • year-round observations since 2003 • First EC flux measurements in the area fensed area in KBU grassland (KBU, semi-arid steppe)

  4. ２．広域地表面熱収支：混合層分散法 KBU 放射センサ 熱電対 Kherlen R. AN-2 KBU周辺航空機パス（2003/08/22） 湿度計 Aircraft ・実施期間：2003年7,8,10月（11回） ・飛行高度：地上200,500,1000m 　　地上観測サイト上空で高度別に往復 ・飛行パス長：約10km（5分） ・測定項目：気温,湿度,地表面放射温度　　　短波放射(上下),GPS位置情報 ・記録間隔：気象測定＝0.1秒,GPS=2秒 ・データ前処理　温湿度：線形トレンド除去

  5. Obs. by RAISE（2002-） Water/heat/carbon budget at the 2 tower sites GPS precipitable water ; 4 sites river discharge, ground water, isotope vegetation and soil characteristics will be published as DVD in 2007 Obs. by Inst. Met. & Hydro. (1993-RAISE period） surface stations will be available in 2007 through RAISE data base CEOP also has a plan for the data opening. Quality check will be involved. Data publications from/through RAISE

  6. 森林 草原 rain evapotranspiration Observed precipitation and evapotranspiration • E at forest is radiation-controlled • E at grassland is soil-moisture-controlled

  7. 森林 草原 Interannual variation of water budget E P E P • Larger amount of rain at the forest (upper basin) • significant recharge region of groundwater and river water • Evaporation at the forest follows rainfall • radiation-controlled evaporation • Evaporation at the grassland in almost contant • soil-moisture-controlled evaporation

  8. Colored water analysis w/ RCM A B Mongolia (A)105-110E, 45-50N 2003.6.1 (B)110-115E-40-45N 2003.9.1 Sato et al. (in preparation)

  9. ZM-NoC: 500ｈPaw ZM-NoC: w at 90 E B A B Tibetan Plateau A Mongolian Plateau [x0.1 m/sec] [x0.1 m/sec] Why it is dry? • ZM-NoC: equilibrium between ZM and radiation （non-adiabatic heating：radiation only, dry RCM） • Dry convection over Tibetan plateau and its slopes • Distinct ubsidence over the dry region at 300～700hPa

  10. Hypothetical view In spring when the subtropical jet is located at the south of Tibetan Plateau ...: Subsidence over northen india. > delayed monsoon-onset Sato & Kimura (MWR, in revision) 5，6月 When the subtropical jet goes upto north....: Subsidence over north of Tibetan plateau (Takramakan, Govi). > suppressed rainfall in the warm season Sato & Kimura (2005, GRL) 7，8月

  11. Future plan • RAISE • “snap-shot” view for 2-3 years of hydroclimatology of the region • post-RAISE • “interannual variability” of hydroclimatorolgy pRAISE

  12. Research Targets • Rainfall process • w ULB radar data & rain gauge mesonet • Rainfall process • interannual variations, intra-annual variations • Interannual variation of Land-atmosphere interaction • vegetation variability and its feedback on the atmosphere • soil-moisture dynamics and its control on the landsurface process

  13. Future plan (2007-2010) in pRAISE • Monitoring continued; • Kherlen river basin: • the 2 tower sites (CEOP reference sites) • river discharge, groundwater

  14. Future plan (2007-2010) in pRAISE • ULB region (in cooperation with IORGC): • Radar data (near ULB airport), rain gauge mesonet (will be setup) • groundwater (in cooperation with IHP)

More Related