GLORIA

GEOMAR Library Ocean Research Information Access

X

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • Wiley  (6)
  • Geography  (6)
  • 1
    Online Resource
    Online Resource
    Effects of nitrogen addition on plant manganese nutrition in a temperate steppe
    Wiley ; 2021
    In:  Journal of Plant Nutrition and Soil Science Vol. 184, No. 6 ( 2021-12), p. 688-695
    Details
    In: Journal of Plant Nutrition and Soil Science, Wiley, Vol. 184, No. 6 ( 2021-12), p. 688-695
    Abstract: Manganese (Mn) is an essential nutrient for plant growth and a key factor driving litter decomposition. Nitrogen (N) deposition is expected to enhance soil Mn availability via soil acidification, and subsequently to increase plant Mn concentrations. Aims We aimed to quantify the responses of Mn concentrations in green and senesced shoots at both species and community levels to N addition, and determine whether N addition would decrease Mn retranslocation efficiency during plant senescence. Methods We examined the changes of Mn concentrations in soil and in green and senesced shoots of all plant species across multiple N addition rates ranging from 0 to 50 g N m −2 y −1 in a temperate steppe after six years treatments. Plant Mn retranslocation efficiency were quantified at species, life form, and community levels. The relationship between plant Mn nutritional parameters and soil Mn availability across the N addition gradient was analyzed. Results There were positive correlations between plant Mn concentrations and N addition rates for most species. Relative to the control plots, community‐level mean Mn concentration in green and senesced shoots in the plots received the highest level of N addition increased by 137.50% (from 0.19 mg kg −1 to 0.08 mg kg −1 ) and 187.50% (from 0.23 mg kg −1 to 0.08 mg kg −1 ), respectively. There was no correlation between Mn retranslocation efficiency and N addition rates at species, life form and community levels. Plant Mn status was weakly correlated with soil Mn concentrations for most species. Conclusions Plant Mn retranslocation showed conserved responses to increasing N addition rates, which would be an adaptive strategy for plants in face of N‐induced higher soil Mn availability.
    Type of Medium: Online Resource
    ISSN: 1436-8730 , 1522-2624
    URL: Issue
    URL: Article
    DOI: 10.1002/jpln.v184.6
    DOI: 10.1002/jpln.202100144
    RVK:
    RA 5430
    Language: English
    Publisher: Wiley
    Publication Date: 2021
    detail.hit.zdb_id: 1481142-X
    detail.hit.zdb_id: 1470765-2
    detail.hit.zdb_id: 200063-5
    SSG: 12
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 2
    Online Resource
    Online Resource
    “Dry gets drier, wet gets wetter”: A case study over the arid regions of central Asia
    Wiley ; 2019
    In:  International Journal of Climatology Vol. 39, No. 2 ( 2019-02), p. 1072-1091
    Details
    In: International Journal of Climatology, Wiley, Vol. 39, No. 2 ( 2019-02), p. 1072-1091
    Abstract: The “dry gets drier, wet gets wetter” (DGDWGW) paradigm well describes the pattern of precipitation changes over the oceans. However, it has also been usually considered as a simplified pattern of regional changes in wet/dry under global warming, although GCMs mostly do not agree this pattern over land. To examine the validity of this paradigm over land and evaluate how usage of drought indices estimated from different hydrological variables affects detection of regional wet/dry trends, we take the arid regions of central Asia as a case study area and estimate the drying and wetting trends during the period of 1950–2015 based on multiple drought indices. These indices include the standardized precipitation index (SPI), the standardized precipitation evapotranspiration index (SPEI), the Palmer drought severity index (PDSI) and self‐calibrating PDSI (sc_PDSI) with both the Thornthwaite (th) and Penman–Monteith (pm) equations in PDSI calculation (namely, PDSI_th, PDSI_pm, sc_PDSI_th and sc_PDSI_pm). The results show that there is an overall agreement among the indices in terms of inter‐annual variation, especially for the PDSIs. All drought indices except SPI show a drying trend over the five states of central Asia (CAS5: including Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan and Uzbekistan). The four PDSIs and SPEI reveal a wetting tendency over the northwestern China (NW; including Xinjiang Uygur Autonomous Region and Hexi Corridor). The contrasting trends between CAS5 and NW can also be revealed in soil moisture (SM) variations. The nonlinear wet and dry variations are dominated by the 3–7 years oscillations for the indices. Relationships between the six indices and climate variables show the major drought drivers have regional features: with mean temperature (TMP), precipitation total (PRE) and potential evapotranspiration (PET) for CAS5, and PRE and PET for NW. Finally, our analyses indicate that the dry and wet variations are strongly correlated with the El Niño/Southern Oscillation (ENSO).
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.2019.39.issue-2
    DOI: 10.1002/joc.5863
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1491204-1
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 3
    Online Resource
    Online Resource
    Tropopause trend across China from 1979 to 2016: A revisit with updated radiosonde measurements
    Wiley ; 2019
    In:  International Journal of Climatology Vol. 39, No. 2 ( 2019-02), p. 1117-1127
    Details
    In: International Journal of Climatology, Wiley, Vol. 39, No. 2 ( 2019-02), p. 1117-1127
    Abstract: The long‐term trend in tropopause has profound implications for the expansion of tropical zone and the variation of large‐scale circulation. However, the changes of tropopause in China have not been explicitly investigated as yet. In this study, the trend of lapse rate tropopause (LRT) height over China has been comprehensively revisited for the period of 1979–2016, using the newly released quality‐controlled radiosonde data from China Meteorological Administration. Results show that the LRT height in most parts of China shows a significant upwards trend with a rate of 370 m/decade, most likely due to global warming. The fastest increase occurs in northwest region, followed by the low‐latitude regions (15°–25°N), while the slowest increase occurs in the high‐latitude regions (45°–55°N). Overall, the LRT height varies with latitudes, exhibiting a “south high and north low” pattern. In particular, high LRT height over low latitudes is found to be expanding rapidly polewards in recent years, in contrast to almost constant LRT height over mid and high latitudes. In terms of the seasonality, tropopause height reaches the peak in summer and bottom in winter. The frequency distribution in the vertical direction exhibits a bimodal pattern with the major peak mostly occurring at around 15 km and a secondary peak occurring between 8 and 12 km. This bimodal distribution is similar to the findings revealed in previous studies. Our findings offer important circumstantial observational evidence for the polewards expansion of the Tropics under global warming.
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.2019.39.issue-2
    DOI: 10.1002/joc.5866
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 1491204-1
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 4
    Online Resource
    Online Resource
    Ultrahigh temperature metamorphism and isobaric cooling of Neoarchean ultramafic‐mafic granulites in the southern granulite terrain, India: Phase equilibrium modelling and SHRIMP zircon U–Pb dating
    Wiley ; 2022
    In:  Journal of Metamorphic Geology Vol. 40, No. 5 ( 2022-06), p. 983-1013
    Details
    In: Journal of Metamorphic Geology, Wiley, Vol. 40, No. 5 ( 2022-06), p. 983-1013
    Abstract: This study presents the results of petrology, SHRIMP zircon U–Pb analysis, conventional Fe–Mg geothermobarometry, REE (rare earth element)‐based geothermobarometry, and phase equilibrium modelling, for newly discovered ultramafic‐mafic granulites (garnet pyroxenite with minor plagioclase and garnet‐bearing granulite) in the Namakkal Block of the southern granulite terrain (SGT), India. Results from this study shed light on the growth, evolution, and thermal state of lower continental crust during the Neoarchean, as a cross‐section of the Archean lower continental crust is well‐exposed in the SGT. SHRIMP zircon U–Pb dating of a garnet pyroxenite sample (18ID‐41) yielded a weighted mean 207 Pb/ 206 Pb age of 2531 ± 6 Ma, which is the same within uncertainty as one weighted mean SHRIMP metamorphic zircon 207 Pb/ 206 Pb age of 2519 ± 9 Ma from mafic granulite sample (18ID‐43). In addition, zircon U–Pb analyses also yielded an apparent 207 Pb/ 206 Pb age of 2474 ± 3 Ma (1σ) for the garnet pyroxenite, and a weighted mean 207 Pb/ 206 Pb age of 2489 ± 8 Ma for the mafic granulite. Thus, the timing of metamorphism of the ultramafic‐mafic granulites was constrained to be ca. 2530–2470 Ma. The peak metamorphic phase assemblage of the garnet pyroxenite is grt–cpx–pl–ilm–liq, which was modelled to be stable at 1058–1172°C/7.8–11.6 kbar, whereas the retrograde mineral assemblage of grt–cpx–hbl–pl–qz–ilm–liq occurred at 877–888°C/9.9–11 kbar. The mafic granulite was demonstrated to record similar peak and retrograde metamorphic P–T conditions to those of the garnet pyroxenite but have a relatively small P–T range of the peak mineral assemblage. The ultrahigh temperature metamorphism of these ultramafic‐mafic granulites was further confirmed by the temperature results (1057–1087°C) from the REE‐in‐two‐pyroxene thermometer. As a result, a retrograde metamorphic P–T path characterized by near‐isobaric cooling from ~1080°C at ~10 kbar to ~900°C at ~10 kbar was constructed for these rocks, which is consistent with an extremely high thermal state that persisted for ca. 60 Ma in the lower crust.
    Type of Medium: Online Resource
    ISSN: 0263-4929 , 1525-1314
    URL: Issue
    URL: Article
    DOI: 10.1111/jmg.v40.5
    DOI: 10.1111/jmg.12654
    RVK:
    RA 1000
    RVK:
    TE 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2020499-1
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 5
    Online Resource
    Online Resource
    Yellow‐brown earth on Quaternary red clay in Langxi County, Anhui Province in subtropical China: Evidence for paleoclimatic change in late Quaternary period
    Wiley ; 2008
    In:  Journal of Plant Nutrition and Soil Science Vol. 171, No. 4 ( 2008-08), p. 542-551
    Details
    In: Journal of Plant Nutrition and Soil Science, Wiley, Vol. 171, No. 4 ( 2008-08), p. 542-551
    Type of Medium: Online Resource
    ISSN: 1436-8730 , 1522-2624
    URL: Issue
    URL: Article
    DOI: 10.1002/jpln.v171:4
    DOI: 10.1002/jpln.200700017
    RVK:
    RA 5430
    Language: English
    Publisher: Wiley
    Publication Date: 2008
    detail.hit.zdb_id: 1481142-X
    detail.hit.zdb_id: 1470765-2
    detail.hit.zdb_id: 200063-5
    SSG: 12
    SSG: 13
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
  • 6
    Online Resource
    Online Resource
    Changes in near‐surface wind speed in China: 1969–2005
    Wiley ; 2011
    In:  International Journal of Climatology Vol. 31, No. 3 ( 2011-03-15), p. 349-358
    Details
    In: International Journal of Climatology, Wiley, Vol. 31, No. 3 ( 2011-03-15), p. 349-358
    Abstract: This study extends upon previous analyses and details near‐surface wind speed change in China and its monsoon regions from 1969 to 2005, using a new dataset consisting of 652 stations. Moreover, causes of wind speed changes are examined. Major results show that most stations in China have experienced significant weakening in annual and seasonal mean wind during the study period. The averaged rate of decrease in annual mean wind speed over China is − 0.018 ms −1 a −1 . Decrease in seasonal mean wind differs. The largest rate of decline is in spring at − 0.021 ms −1 a −1 and the least is in summer at − 0.015 ms −1 a −1 . Spatially, large declines are found in northern China, the Tibetan Plateau and the coastal areas in east and southeast China, while central and south–central China have the least change in their wind speed. Significant weakening of wind speed has occurred primarily in strong wind categories. Decreases in light wind categories are trivial, and light wind has even increased slightly in parts of central China. These changes indicate reduced fluctuations in wind and wind storms in recent decades, contributing to decreased frequency and magnitude of dust storms. The trivial changes in summer winds in east and southeast China suggest fairly steady monsoon winds over the decades. A main cause of the weakening wind is shown to be the weakening in the lower‐tropospheric pressure‐gradient force, a result pointing to climate variation as the primary source of the wind speed change. Superimposed on the climate effect is the urban effect. While analysis of winds between urban and rural stations reinstate the urban frictional effect, a peculiar stronger increase in wind at urban stations than at rural stations after the abrupt urbanization since 1990 indicates a new aspect of the urban effect on wind speed. Copyright © 2010 Royal Meteorological Society
    Type of Medium: Online Resource
    ISSN: 0899-8418 , 1097-0088
    URL: Issue
    URL: Article
    DOI: 10.1002/joc.v31.3
    DOI: 10.1002/joc.2091
    RVK:
    RA 1000
    Language: English
    Publisher: Wiley
    Publication Date: 2011
    detail.hit.zdb_id: 1491204-1
    SSG: 14
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...