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Chinese Science Bulletin, Volume 64 , Issue 27 : 2949-2958(2019) https://doi.org/10.1360/TB-2019-0101

Black carbon profiles from tethered balloon flights over the southeastern Tibetan Plateau

Mo Wang 1,2, Baiqing Xu 1,2,*, Song Yang 1, Jing Gao 1,2, Taihua Zhang 3, Zeqing He 3, Matjaž Kobal 4, A.D.A. Hansen 5
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  • ReceivedMay 27, 2019
  • AcceptedJul 15, 2019
  • PublishedAug 29, 2019
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Abstract


Funded by

国家自然科学基金(41771091)

中国科学院战略性先导科技专项(XDA20070100)

中国科学院前沿科学重点研究项目(QYZDJ-SSW-DQC037)


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  • Click to view Download high-quality image

    Figure 1

    Profiles of BC concentration (BC), potential temperature (θ) and relative humidity (RH) during the flight segments F3-ASC (a), F3-DES (b) and F1 (c). The horizontal gray dash lines show the corresponding tops of the stable boundary layers (SBL) and residual layers (RL). The vertical gray dash lines show the corresponding mean BC concentrations in the SBL, RL and FT (free troposphere). The black inverted triangles mark the mean BC concentrations measured at ground level during these flight segments

  • Click to view Download high-quality image

    Figure 2

    Profiles of biomass burning contribution (BB), potential temperature (θ) and relative humidity (RH) during the flight segments F3-ASC (a), F3-DES (b) and F1 (c). The horizontal gray dash lines show the corresponding tops of the stable boundary layers (SBL) and residual layers (RL). The vertical gray dash lines show the corresponding mean BB in the SBL, RL and FT (free troposphere). The black inverted triangles mark the mean BB contributions measured at ground level during these flight segments

  • Click to view Download high-quality image

    Figure 3

    24-h backward trajectories starting at 6:00 local time on December 3rd, 2017, computed using the HYSPLIT model at 150, 500 and 2000 m a.g.l. The experimental location is marked with a black star

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    Figure 4

    Time series of (a) biomass burning contribution (BB), (b) BC concentration (BC), (c) relative humidity (RH), (d) potential temperature (θ) and (e) elevation (m) when the balloon was above the stable boundary layer (SBL) in the 3rd Flight. P2 and P4 with obviously sharp changes of potential temperature and relative humidity are noted by gray shadow boxes. Five time periods (P1–P5) are described in detail in Section 2.2 in the present study. Horizontal dash lines in (a) and (b) show the mean BB contribution and mean BC concentration above the SBL

  • Table 1   Heights (H) of stable boundary layers, residual layers and free troposphere, and corresponding mean black carbon concentrations () and mean biomass burning contributions () during the flight segments F3-ASC, F3-DES and F1

    F3-ASC过程

    F3-DES过程

    F1过程

    高度(m)

    BC(ng/m3)

    BB(%)

    高度(m)

    BC(ng/m3)

    BB(%)

    高度(m)

    BC(ng/m3)

    BB(%)

    SBL

    210

    470±170

    34±11

    140

    1750±590

    57±15

    180

    640±210

    14±7

    RL

    950

    130±30

    16±6

    950

    150±50

    16±6

    N.A.

    220±80

    13±4

    FT

    N.A.

    120±50

    11±5

    N.A.

    120±40

    16±5

    N.A.

    N.A.

    N.A.

    N.A.表示无数据