Dew formation characteristics in the gravel desert ecosystem and its ecological roles on Reaumuria soongorica

Zhuang, Yanli; Zhao, Wenzhi; Luo, Lihui; Wang, Lixin

doi:10.1016/j.jhydrol.2021.126932

Cited by 19 publications

(24 citation statements)

References 50 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results of our study showed that the daily dew amount was concentrated in 0.03-0.10 mm (its frequency was 60%) during the observation period. Our results are generally consistent with findings reported for the Badain Jaran Desert (Zhuang and Zhao, 2014;Zhuang et al, 2021). Manual measurement of the dew amount provided us with valuable information about daily dew condensation, by analyzing the relationship between the dew amount and meteorological variables.…”

Section: Measured Dew Amount and Its Correlation With Meteorological ...supporting

confidence: 91%

Dew amount and its long-term variation in the Kunes River Valley, Northwest China

et al. 2022

View full text Add to dashboard Cite

Dew is an essential water resource for the survival and reproduction of organisms in arid and semi-arid regions. Yet estimating the dew amount and quantifying its long-term variation are challenging. In this study, we elucidate the dew amount and its long-term variation in the Kunes River Valley, Northwest China, based on the measured daily dew amount and reconstructed values (using meteorological data from 1980 to 2021), respectively. Four key results were found: (1) the daily mean dew amount was 0.05 mm during the observation period (4 July-12 August and 13 September-7 October of 2021). In 35 d of the observation period (i.e., 73% of the observation period), the daily dew amount exceeded the threshold (>0.03 mm/d) for microorganisms; (2) air temperature, relative humidity, and wind speed had significant impacts on the daily dew amount based on the relationships between the measured dew amount and meteorological variables; (3) for estimating the daily dew amount, random forest (RF) model outperformed multiple linear regression (MLR) model given its larger R 2 and lower MAE and RMSE; and (4) the dew amount during June-October and in each month did not vary significantly from 1980 to the beginning of the 21 st century. It then significantly decreased for about a decade, after it increased slightly from 2013 to 2021. For the whole meteorological period of 1980-2021, the dew amount decreased significantly during June-October and in July and September, and there was no significant variation in June, August, and October. Variation in the dew amount in the Kunes River Valley was mainly driven by relative humidity. This study illustrates that RF model can be used to reconstruct long-term variation in the dew amount, which provides valuable information for us to better understand the dew amount and its relationship with climate change.

show abstract

Section: Measured Dew Amount and Its Correlation With Meteorological ...supporting

confidence: 91%

Dew amount and its long-term variation in the Kunes River Valley, Northwest China

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Dew can provide up to 63% of plant water needs in certain environments (Hill et al, 2015). Some examples are that dew occurs at 36%, 59% and 79% of the nights during growing season in the gravel desert ecosystem at the edge of a desert oasis, an arid oasis cropland, and sub‐humid cropland, respectively (Deser et al, 2017; Zhuang et al, 2021). Comparing with rain, dew depends on the immediate environmental characteristics and can provide insights into the local environment (Lekouch et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Comparing with rain, dew depends on the immediate environmental characteristics and can provide insights into the local environment (Lekouch et al, 2010). Relative humidity (hereafter RH), air temperature, wind speed, the difference between air temperature and soil surface temperature, and atmospheric water vapour concentration have significant effects on dew formation (Deser et al, 2017; Zhuang et al, 2021). Generally, dew amount has a strong linear dependency on the nighttime RH (Ritter et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…The absolute amount of dew is not high in arid regions, but it can be a constant and stable water resource (Zhuang et al, 2021). In addition, the occurrence frequency and duration of dew events are higher than those of precipitation, and the annual and inter-annual fluctuations are smaller (Romps, 2017), therefore plants that can use dew as a water source are also more resistant to the water limitations caused by drought (Hill et al, 2015).…”

mentioning

confidence: 99%

“…Dew can improve the relative water content, water potential, and photosynthetic performance to plants growing in extremely dry environments since some plants could absorb dew through special waterabsorbing scales in the leaves (Lawrence, 2005;Zhuang et al, 2021).…”

mentioning

confidence: 99%

See 2 more Smart Citations

The moisture origin of dew: Insights from three sites with contrasting climatic conditions

Tian

Wang

et al. 2023

Hydrological Processes

Self Cite

View full text Add to dashboard Cite

Dew is one of the important moisture sources in many arid and semiarid regions. The knowledge of moisture origin of dew under various climatic conditions is still lacking. Isotopic variations can preserve information about moisture origin and formation mechanisms. Therefore, the isotopic compositions of dew and precipitation (δ 2 H, δ 18 O, δ 17 O, d-excess, lc-excess and 17 O-excess) were investigated at three sites with different climatic conditions (i.e., Gobabeb with extremely dry climate, Nice with Mediterranean climate and Indianapolis with humid continental climate). The results showed that there were three types of dew at Gobabeb: advective dew, groundwater-derived dew, and shallow soil water-derived dew, accounting for 27.3%, 45.4% and 27.3% of the dew events, respectively. The ultimate moisture sources of advective dew and the other two types of dew at Gobabeb were from the South Atlantic Ocean and a mixture of the Indian and South Atlantic Oceans, respectively. Dew in Nice included ocean-derived dew from the North Atlantic Ocean with local evapotranspiration replenishment, and local-derived dew, mainly from the continental Europe and Mediterranean Sea, accounting for 39.1% and 60.9% of the dew events, respectively. All the Indianapolis dew were likely local-derived dew. Based on the moisture origins, the future dew trends were speculated under global warming. Dew frequencies at Gobabeb and Indianapolis under future climates are uncertain due to the concurrent increases in atmospheric water vapour and temperature. The local-derived dew in Nice would likely decrease due to the decreasing precipitation and increasing drought, and the ocean-derived dew under future climates is uncertain. This study provides a practical method to distinguish dew moisture sources, and such information is useful for future prediction of dew trends under climate change. K E Y W O R D S climate change, dew source, ecohydrology, stable isotopes 1 | INTRODUCTION Dew is an important hydrological input to many ecosystems especially in dry regions, and dew frequency could even exceed rain during extreme drought (

show abstract

Seasonal variations and sources of the dew from stable isotopes in alpine meadows

Li,

Zhang,

et al. 2023

Hydrological Processes

View full text Add to dashboard Cite

The dew is closely related to the micro‐use water of plants and the large‐scale hydrological processes, its formation on grassland plays a vital role especially in maintaining the eco‐hydrological cycle. We used structural equation modelling to investigate how environmental factors would affect dew formation on alpine graminoid‐Kobresia meadow in northern Qinghai‐Tibet Plateau. The stable isotope information of dew, ambient vapour, soil water, plant water, creek water and precipitation were tracked to explore the source of dew, the dew transport route of the six dominant species by Mix SIAR model. Our results showed that the frequency of dew on the graminoid‐Kobresia meadow in 2020 and 2021 was 42.86% and 45.83%, respectively. Both atmospheric pressure (r = 0.4) and temperature (r = 0.382) showed significant positive effects dew formation while wind speed (r = −0.309) had a negative effect. The contribution rates of soil water, plant water and ambient water vapour to dew were 48.20 ± 5.46%, 38.30 ± 5.07%, and 13.50 ± 1.82%, respectively. The proportion of dew utilization in the dominant species had no significant species differences. Our results provided an improved understanding of dew formation based on isotope technology on alpine meadow in northern Qinghai‐Tibet Plateau.

show abstract

Dew formation characteristics in the gravel desert ecosystem and its ecological roles on Reaumuria soongorica

Cited by 19 publications

References 50 publications

Dew amount and its long-term variation in the Kunes River Valley, Northwest China

Dew amount and its long-term variation in the Kunes River Valley, Northwest China

The moisture origin of dew: Insights from three sites with contrasting climatic conditions

Seasonal variations and sources of the dew from stable isotopes in alpine meadows

Contact Info

Product

Resources

About