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  • Wiley  (7)
  • Zhang, Xuezhen  (7)
  • 1
    Online Resource
    Online Resource
    Responses and feedbacks of vegetation dynamics to precipitation anomaly over the semiarid area of north China: Evidences from simulations of the WRF‐Noah model
    Wiley ; 2023
    In:  International Journal of Climatology Vol. 43, No. 2 ( 2023-02), p. 804-817
    Details
    In: International Journal of Climatology, Wiley, Vol. 43, No. 2 ( 2023-02), p. 804-817
    Abstract: Knowledge of the responses and feedbacks of vegetation dynamics to interannual climate anomalies in the semiarid area of north China is lacking. This study addresses this issue through climate modelling for 1991–2006 with the Weather Research and Forecast (WRF) model, into which a locally empirical vegetation dynamic (VED) scheme was implemented. The VED scheme was built on the basis of regression models of the leaf area index (LAI), green vegetation fraction (GVF), and surface albedo (ALB) with ambient temperature and humidity as independent variables. Using the update WRF model, the climate simulations were carried out with turning on and off VED, respectively. By comparing the simulations outputs with each other, we find that the interannual variability of precipitation from simulations with turning on VED is larger than that from simulations with turning off VED. The larger interannual variability of precipitation could be explained by VED feedback. Vegetation growth would be more vigorous, as a response, under the more precipitation, because which brings more available water. In turn, vigorous vegetation leads to more evapotranspiration and, hence, precipitable water; as a result, there would be more precipitation. It is reversed for the years with less precipitation. Such interactions between vegetation and precipitation could be summarized as positive feedback loops. This study suggests that the interannual precipitation variability can be enlarged by VED through positive evapotranspiration–precipitation feedback. It is therefore necessary to consider the vegetation dynamics for future downscaled regional climate predictions to pursue more reliable interannual climate variability.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v43.2
    DOI: 10.1002/joc.7830
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1491204-1
    detail.hit.zdb_id: 1000947-4
    SSG: 14
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  • 2
    Online Resource
    Online Resource
    Regional differences in summer monsoon precipitation variability reconstructed from multiple proxies in Asia during the past millennium
    Wiley ; 2023
    In:  International Journal of Climatology Vol. 43, No. 4 ( 2023-03-30), p. 1853-1870
    Details
    In: International Journal of Climatology, Wiley, Vol. 43, No. 4 ( 2023-03-30), p. 1853-1870
    Abstract: Rainfall in the Asia summer monsoon (ASM) domain has a complex spatial pattern with the temporal variability at different timescales and their long‐term change has not been fully characterized. An updated 320 multiple proxies network is used to reconstruct the May–October precipitation during the past millennium for eight regions in the ASM domain. The spatial consistency of summer monsoon precipitation variability and the possible links to the internal climate oscillations are investigated. The results show that the regional precipitations over the last millennium in the ASM regions are dominated by the interannual cycle of 2–2.5a and 3.5‐5a, the decadal cycle of ~11a and 15–25a and the multidecadal cycle of ~30a and 40–80a. Coherent dry decades in different regions appear in 1100–1250, 1600–1650 and 1960–2000, while the wet decades appear in 970–990, 1330–1350, 1380–1430, 1550–1580, 1700–1780 and 1810–1910. On interannual scale, the relationships between precipitation for each region and El Niño–Southern Oscillation (ENSO) in both developing and decaying stages are unstable over the entire millennium, but they have opposite‐sign correlations most of the time, which implies that the summer precipitation anomaly for a region tends to reverse in the next summer when a strong ENSO event occurs in the winter. For the long‐term change from multidecadal to centennial scales, the longest dry period of the 12th to 13th centuries in eastern Asia coincides with the period with the lowest ENSO variability due to the in phase change of the Atlantic Multidecadal Oscillation and the Pacific Decadal Oscillation, which could result in the neutral interbasin east–west cell in Tropics and low frequency of ENSO events.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v43.4
    DOI: 10.1002/joc.7949
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2023
    detail.hit.zdb_id: 1491204-1
    detail.hit.zdb_id: 1000947-4
    SSG: 14
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  • 3
    Online Resource
    Online Resource
    Spatial patterns of precipitation anomalies in eastern China during centennial cold and warm periods of the past 2000 years : SPATIAL PATTERNS OF PRECIPITATION ANOMALIES IN COLD AND WARM PERIODS
    Wiley ; 2016
    In:  International Journal of Climatology Vol. 36, No. 1 ( 2016-01), p. 467-475
    Details
    In: International Journal of Climatology, Wiley, Vol. 36, No. 1 ( 2016-01), p. 467-475
    Type of Medium: Online Resource
    ISSN: 0899-8418
    URL: Article
    DOI: 10.1002/joc.4367
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2016
    detail.hit.zdb_id: 1000947-4
    SSG: 14
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  • 4
    Online Resource
    Online Resource
    Effects of toxic cyanobacteria and ammonia on flesh quality of blunt snout bream ( Megalobrama amblycephala )
    Wiley ; 2017
    In:  Journal of the Science of Food and Agriculture Vol. 97, No. 4 ( 2017-03), p. 1200-1206
    Details
    In: Journal of the Science of Food and Agriculture, Wiley, Vol. 97, No. 4 ( 2017-03), p. 1200-1206
    Abstract: Toxic cyanobacterial blooms result in the production of an organic biomass containing cyanotoxins (e.g. microcystins) and an elevated ammonia concentration in the water environment. The ingestion of toxic cyanobacteria and exposure to ammonia are grave hazards for fish. The present study assessed the effects of dietary toxic cyanobacteria and ammonia exposure on the flesh quality of blunt snout bream ( Megalobrama amblycephala ). RESULTS Dietary toxic cyanobacteria and ammonia exposure had no impact on fish growth performance, fillet proximate composition and drip loss, whereas it significantly decreased fillet total amino acids, total essential amino acids, hardness and gumminess, and increased fillet ultimate pH as well as malondialdehyde content. However, there was no significant interaction between dietary toxic cyanobacteria and ammonia exposure on these parameters. Additionally, dietary toxic cyanobacteria significantly increased fillet initial pH , thaw loss and protein carbonyl content, whereas ammonia exposure did not. CONCLUSION The results of the present study indicate that dietary toxic cyanobacteria and ammonia exposure reduced the quality of blunt snout bream fillet. © 2016 Society of Chemical Industry
    Type of Medium: Online Resource
    ISSN: 0022-5142 , 1097-0010
    URL: Issue
    URL: Article
    DOI: 10.1002/jsfa.2017.97.issue-4
    DOI: 10.1002/jsfa.7850
    Language: English
    Publisher: Wiley
    Publication Date: 2017
    detail.hit.zdb_id: 184116-6
    detail.hit.zdb_id: 2001807-1
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  • 5
    Online Resource
    Online Resource
    Explorations of the optimal method for isolating oocytes from zebrafish ( Danio rerio ) ovary
    Wiley ; 2018
    In:  Journal of Experimental Zoology Part B: Molecular and Developmental Evolution Vol. 330, No. 8 ( 2018-12), p. 417-426
    Details
    In: Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, Wiley, Vol. 330, No. 8 ( 2018-12), p. 417-426
    Abstract: Obtaining oocytes from the adult female zebrafish ( Danio rerio ) ovary has enormous importance in the studies of developmental biology, toxicology, and genetics. It is vital to establish a simple and effective approach to ensure the quantity and quality of oocytes, which will enable the success of follow‐up experimental investigation finally. Usually, oocytes are separated with mechanical or enzymatic methods, however, little studies have been done with concerns about the comparative effects. The present study separated zebrafish oocytes of Stage III with five frequently used methods, including stripping, pipetting, hyaluronidase (1.6 mg/ml), collagenase (0.4 mg/ml), and trypsin (0.1%). The cell viability, oxidative stress, mitogen‐activated protein kinase (MAPK) protein phosphorylation, and apoptosis levels were selected as main biomarkers to evaluate the oocytes health status. The results showed that both trypsin and hyaluronidase isolation significantly upregulated germinal vesicle breakdown (GVBD) rates and downregulated p38 MAPK activity simultaneously. GVBD rates and survival rates were decreased notably in oocytes separated by the collagenase method. Above results indicate that zebrafish oocytes in vitro are sensitive to enzymatic treatments and the enzymatic isolation is not the suitable mean for collecting zebrafish oocytes although it is time‐saving. The mechanical strategy of pipetting remarkably increased the reactive oxygen species and malondialdehyde level in isolated oocytes. Interestingly, oocytes separated with stripping show less physiological and biochemical damages. Therefore, stripping isolation is comparatively recommended as the optimum method for separating and collecting numerous intact and healthy zebrafish oocytes in vitro for the subsequent developmental research.
    Type of Medium: Online Resource
    ISSN: 1552-5007 , 1552-5015
    URL: Issue
    URL: Article
    DOI: 10.1002/jezb.b.v330.8
    DOI: 10.1002/jez.b.22841
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2103823-5
    detail.hit.zdb_id: 2113204-5
    SSG: 12
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  • 6
    Online Resource
    Online Resource
    Effects of irrigation‐induced surface thermodynamics changes on wind speed in the Heihe River basin, Northwest China
    Wiley ; 2024
    In:  International Journal of Climatology Vol. 44, No. 10 ( 2024-08), p. 3445-3463
    Details
    In: International Journal of Climatology, Wiley, Vol. 44, No. 10 ( 2024-08), p. 3445-3463
    Abstract: The Heihe River Basin, located in Northwest China, serves as a major commodity grain base in China due to its state‐of‐the‐art irrigation system. The rapid increase in soil moisture caused by irrigation can alter the land–atmosphere energy fluxes and regulate regional climate. However, the effects and mechanisms of irrigation on wind speed related to thermodynamics remain unclear. Here, we carried out two 10‐year numerical simulations using the Weather Research and Forecast (WRF) model incorporating a real‐time irrigation scheme. By comparing the simulation differences (including and excluding irrigation), we found that irrigation significantly decreased the daily mean and maximum wind speed at 10 m above ground by 0.30 and 0.55 m·s −1 , respectively, in the irrigated area during the growth season. Such surface wind slowdown could be explained by irrigation‐induced surface air cooling and, hence, intensifying atmospheric column stability, weakening turbulent momentum transport, as well as opposite‐to‐prevailing winds vector anomaly caused by increased southward pressure gradient. Meanwhile, we also found wind slowdown mainly occurs below 1100 m while acceleration effect above that level. It was highlighted that the surface wind slowdown effect of irrigation substantially improved the performance of the WRF model. Due to the surface wind slowdown effect of irrigation, the positive bias of daily mean and maximum wind speed simulated by the WRF model was reduced by 15.3% and 27.4%, respectively. Our findings implicate the potential importance of irrigation in improving the performance of climate models as well as in explaining the phenomenon of global stilling.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v44.10
    DOI: 10.1002/joc.8532
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2024
    detail.hit.zdb_id: 1491204-1
    detail.hit.zdb_id: 1000947-4
    SSG: 14
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  • 7
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    Online Resource
    Crop Yield and Temperature Changes in North China during 601–900 AD
    Wiley ; 2014
    In:  Advances in Meteorology Vol. 2014 ( 2014), p. 1-6
    Details
    In: Advances in Meteorology, Wiley, Vol. 2014 ( 2014), p. 1-6
    Abstract: Depending on the descriptions of crop yield and social response to crop failure/harvest from Chinese historical documents, we classified the crop yield of North China during 601–900 AD into six categories and quantified each category to be the crop yield grades. We found that the regional mean crop yield had a significant ( P 〈 0.01 ) negative trend at the rate of −0.24% per decade. The interannual, multiple-decadal, and century-scale variability accounted for ~47%, ~30%, and ~20% of the total variations of crop yield, respectively. The interannual variability was significantly ( P 〈 0.05 ) persistent across the entire period. The multiple-decadal variability was more dominant after 750 AD than that before 750 AD, while the century-scale variability was more dominant before 750 AD than that after 750 AD. The variations of crop yield could be partly explained by temperature changes. On one hand, the declining trend of crop yield cooccurred with the climate cooling trend from 601 to 900 AD; on the other hand, the crop yield was positively correlated with temperature changes at 30-year resolution with the correlation coefficient of 0.59 ( P 〈 0.1 ). These findings supported that high (low) crop yield occurred in the warming (cooling) climate.
    Type of Medium: Online Resource
    ISSN: 1687-9309 , 1687-9317
    URL: Article
    DOI: 10.1155/2014/137803
    Language: English
    Publisher: Wiley
    Publication Date: 2014
    detail.hit.zdb_id: 2486777-9
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