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JOURNAL OF NATURAL RESOURCES >

2011 , Vol. 26 >Issue 4: 619 - 634

DOI: https://doi.org/10.11849/zrzyxb.2011.04.008

Resources Ecology

Modeled Effects of Changes in the Amount and Diffuse Fraction of PAR on Forest GPP

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  • 1. State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China;
    2. Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs & Ministry of Education, Beijing 100875, China;
    3. School of Geodesy & Geomatics Engineering, Huaihai Institute of Technology, Lianyungang 222005, China;
    4. Institute of Atmospheric Physics, CAS, Beijing 100029, China

Received date: 2010-08-10

  Revised date: 2010-12-10

  Online published: 2011-04-29

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Abstract

The scattering and absorption of solar radiation by anthropogenic aerosols reduce the amount of photosynthetically active radiation (PAR) reaching the earth's surface and increase the fraction of PAR that is diffuse (FDIFF), with the counteracting effects on plants photosynthesis which determines terrestrial ecosystem's gross primary production (GPP). For the complex interactions among the total PAR amount, FDIFF, temperature and humidity, it's difficult to derive the quantitative relationship between FDIFF and GPP from present field and experimental measurements, leading to substantial uncertainty and dispute about the projection of the production and carbon assimilation of terrestrial biosphere influenced by emissions of anthropogenic aerosols. Using a process-based canopy photosynthesis model (MAESTRA), we explored respective and combined effects of changes in PAR amount and the FDIFF on GPP in three typical forests among the North-South Transect of Eastern China (NSTEC). The results showed that the responses of GPP to PAR amount changes were consistently positive in all three sites, while the magnitudes of GPP change were determined not only by the degrees of PAR amount change but also the sensitivity of GPP to these changes, which was generally depressed to nearly naught by higher PAR amount and/or lower temperature from about 0.6 g C mol-1 when incident PAR was lower and temperature was not limited. The increase of FDIFF stimulated absorption and use efficiencies of incident PAR in the three forests, as a result of the difference, which was depressed by lower temperature and/or fewer leaf area, between the efficiencies of direct and diffuse PAR, leading to the magnitudes of GPP change responding to FDIFF changes were also influenced by the temperature and leaf area as well as the degree of FDIFF changes and the total PAR amount. Investigating the relations between the changes of diffuse PAR and total amount was necessary in quantifying the combined effects of these changes on GPP, which were generally the consequence of the counteraction of respective effects of the changes. In our results, the counteraction was usually significant under conditions with greater PAR amount, but the direction of GPP changes was still mainly controlled by the changes of PAR amount. The year-around offset was about 1/3 － 1/2 of the degree of the effect of total amount changes.

Key words： carbon cycle; GPP; ecosystem modeling; PAR; fraction of diffuse radiation; forest ecosystem; MAESTRA

Cite this article

HE Xue-zhao, ZHOU Tao, JIA Gen-suo, ZHANG Zi-yin, LI Xiu-juan, ZHAO Chao, FENG Sheng-hui . Modeled Effects of Changes in the Amount and Diffuse Fraction of PAR on Forest GPP[J]. JOURNAL OF NATURAL RESOURCES, 2011 , 26(4) : 619 -634 . DOI: 10.11849/zrzyxb.2011.04.008

References

[1] IPCC. Climate Change 2007: The Physical Science Basis-The Fourth Assessment Report of the Intergovernmental Panel on Climate Change [M]. New York: Cambridge Univ. Press, 2007. [2] Houghton R A. Balancing the global carbon budget [J]. Annual Review of Earth and Planetary Sciences, 2007, 35: 313-347. [3] Schimel D S, House J I, Hibbard K A, et al. Recent patterns and mechanisms of carbon exchange by terrestrial ecosystems [J]. Nature, 2001, 414: 169-172. [4] 周涛, 仪垂祥, Bakwin P S, 等. 大气CO2浓度变化与生物群系气候异常之间的关联分析[J]. 中国科学D辑, 2008, 38(2): 224-231. [5] Piao S, Fang J, Ciais P, et al. The carbon balance of terrestrial ecosystems in China [J]. Nature, 2009, 458: 1009-1014. [6] Chapin F S. Principles of Terrestrial Ecosystem Ecology [M]. New York: Springer, 2002. [7] Zhou T, Luo Y. Spatial patterns of ecosystem carbon residence time and NPP-driven carbon uptake in the conterminous United States [J]. Global Biogeochemical Cycles, 2008, 22, doi: 10.1029/2007GB002939. [8] Mercado L M, Bellouin N, Sitch S, et al. Impact of changes in diffuse radiation on the global land carbon sink [J]. Nature, 2009, 458: 1014-1018. [9] Gilgen H, Wild M, Ohmura A. Means and trends of shortwave irradiance at the surface estimated from Global Energy Balance Archive data [J]. Journal of Climate, 1998, 11: 2042-2061. [10] Liepert B G. Observed reductions of surface solar radiation at sites in the United States and worldwide from 1961 to 1990 [J]. Geophysical Research Letters, 2002, 29, doi: 10.1029/2002GL014910. [11] Stanhill G, Cohan S. Global dimming a review of the evidence for a widespread and significant reduction in global radiation with discussion of its probable causes and possible agricultural consequences [J]. Agricultural and Forest Meteorology, 2001, 107: 255-278. [12] Pinker R T, Zhang B, Dutton E G. Do satellites detect trends in surface solar radiation? [J] Science, 2005, 308: 850-854. [13] Mishchenko M I, Geogdzhayev I V, Rossow W B, et al. Long term satellite record reveals likely recent aerosol trend [J]. Science, 2007, 315: 1543. [14] Wild M, Gilgen H, Roesch A, et al. From dimming to brightening: decadal changes in solar radiation at earth’s surface. Science, 2005, 308: 847-850. [15] Wild M, Trüssel B, Ohmura A, et al. Global dimming and brightening: An update beyond 2000 [J]. Journal of Geophysical Research, 2009, 114, doi: 10.1029/2008JD011382. [16] Roderick M L, Farquhar G D, Berry S, et al. On the direct effect of clouds and atmospheric particles on the productivity and structure of vegetation [J]. Oecologia, 2001, 129: 21-30. [17] Yamasoe M A, von Randow C, Manzi A O, et al. Effect of smoke and clouds on the transmissivity of photosynthetically active radiation inside the canopy [J]. Atmospheric Chemistry and Physics, 2006, 6: 1645-1656. [18] Gu L H, Baldocchi D D, Wofsy S, et al. Response of a deciduous forest to the Mount Pinatubo eruption: Enhanced photosynthesis [J]. Science, 2003, 299: 2035-2038. [19] Niyogi D, Chang H, Saxena V K, et al. Direct observations of the effects of aerosol loading on net ecosystem CO2 exchanges over different landscapes [J]. Geophysical Research Letters, 2004, 31, doi: 10.1029/2004GL020915. [20] Oliveira P H F, Artaxo P, Pires C, et al. The effects of biomass burning aerosols and clouds on the CO2 flux in Amazonia [J]. Tellus B, 2007, 59, doi: 10.1111/j.1600-0889.2007.00270. [21] Farquhar G D, Roderick M L. Pinatubo, diffuse Light, and the carbon cycle [J]. Science, 2003, 299: 1997-1998. [22] Cohan D S, Xu J, Greenwald R, et al. Impact of atmospheric aerosol light scattering and absorption on terrestrial net primary productivity [J]. Global Biogeochemical Cycles, 2002, 16, doi: 10.1029/2001GB001441. [23] Jones C D, Cox P M. Modeling the volcanic signal in the atmospheric CO2 record [J]. Global Biogeochemical Cycles, 2001, 12: 453-465. [24] Krakauer N Y, Randerson J T. Do volcanic eruptions enhance or diminish net primary production? Evidence from tree rings [J]. Global Biogeochemical Cycles, 2003, 17, doi: 10.1029/2003GB002076. [25] Alton P B. Reduced carbon sequestration in terrestrial ecosystems under overcast skies compared to clear skies [J]. Agricultural and Forest Meteorology, 2008, 148: 1641-1653. [26] 方精云, 郭兆迪, 朴世龙, 等. 1981—2000年中国陆地植被碳汇的估算[J]. 中国科学D辑, 2007, 37(6): 804-812. [27] 邵振艳, 周涛, 史培军, 等. 大气污染对中国重点城市地面总辐射影响的时空特征[J]. 高原气象, 2009, 28(5): 1105-1114. [28] 王春林, 于贵瑞, 周国逸, 等. 鼎湖山常绿针阔叶混交林CO2通量估算[J]. 中国科学D辑: 地球科学, 2006, 36(增刊Ⅰ): 119-129. [29] 王春林, 周国逸, 唐旭利, 等. 鼎湖山针阔叶混交林生态系统呼吸及其影响因子[J]. 生态学报, 2007, 27(7): 2659-2668. [30] Yu G, Zhang L, Sun X, et al. Environmental controls over carbon exchange of three forest ecosystems in eastern China [J]. Global Change Biology, 2008, 14, doi: 10.1111/j.1365-2486.2008.01663.x. [31] 刘允芬, 于贵瑞, 温学发, 等. 千烟洲中亚热带人工林生态系统CO2通量的季节变异特征[J]. 中国科学D辑: 地球科学, 2006, 36(增刊Ⅰ): 91-102. [32] 于贵瑞, 温学发, 李庆康, 等. 中国亚热带和温带典型森林生态系统呼吸的季节模式及环境响应特征[J]. 中国科学D辑: 地球科学, 2004, 34(增刊Ⅱ): 85-95. [33] 王秋凤, 牛栋, 于贵瑞, 等. 长白山森林生态系统CO2和水热通量的模拟研究[J]. 中国科学D辑: 地球科学, 2004, 34(增刊Ⅱ): 131-140. [34] Medlyn B E. A MAESTRO retrospective [M]//Mencuccini M, Moncrieff J, McNaughton K, et al. Forests at the Land-Atmosphere Interface. CABI Publishing, 2004: 105-121. [35] Wang Y P, Jarvis P G. Description and validation of an array model—MAESTRO [J]. Agricultural and Forest Meteorology, 1990, 51: 257-280. [36] McMurtrie R E, Wang Y P. Mathematical models of the photosynthetic response of tree stands to rising CO2 concentrations and temperatures [J]. Plant Cell Environment, 1993, 16: 1-13. [37] Wang Y P, Rey A, Jarvis P G. Carbon balance of young birch trees grown in ambient and elevated atmospheric CO2 concentrations [J]. Global Change Biology, 1998, 4: 797-807. [38] Luo Y Q, Medlyn B E, Hui D F, et al. Gross primary productivity in Duke Forest: Modeling synthesis of CO2 experiment and eddy-flux data [J]. Ecological Applications, 2001, 11(1): 239-252. [39] Spitters C J T, Toussaint H A J M, Goudriaan J. Separating the diffuse and direct component of global radiation and its implications for modeling canopy photosynthesis [J]. Agricultural and Forest Meteorology, 1986, 38: 217-229. [40] 查良松. 我国地面太阳辐射量的时空变化研究[J]. 地理科学, 1996, 16: 232-237. [41] Che H Z, Shi G Y, Zhang X Y, et al. Analysis of 40 years of solar radiation data from China [J]. Geophysical Research Letters, 2005, 32, doi: 1029/2004GL022322. [42] 李晓文, 李维亮, 周秀骥. 中国近30年太阳辐射状况研究[J]. 应用气象学报, 1998, 9: 24-31. [43] Liang F, Xia X A. Long-term trends in solar radiation and the associated climatic factors over China for 1961－2000 [J]. Annales Geophysicae, 2005, 23: 2425-2432. [44] Qian Y, Kaiser D P, Leung L R, et al. More frequent cloud-free sky and less surface solar radiation in China from 1955 to 2000 [J]. Geophysical Research Letters, 2006, 33, doi: 10.1029/2005GL024586.
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