Next Article in Journal
A Decade of Aerosol Optical Properties Measurements over Athens, Greece
Previous Article in Journal
Willingness to Pay for Green Infrastructure in Residential Development—A Consumer Perspective
Open AccessArticle

Warm Island Effect in the Badain Jaran Desert Lake Group Region Inferred from the Accumulated Temperature

Center for Glacier and Desert Research, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China
*
Author to whom correspondence should be addressed.
Atmosphere 2020, 11(2), 153; https://doi.org/10.3390/atmos11020153
Received: 15 December 2019 / Revised: 18 January 2020 / Accepted: 29 January 2020 / Published: 30 January 2020
The Badain Jaran Desert (BJD) is characterized by the coexistence of over 110 perennial lakes and thousands of megadunes in its southeast part. Unlike the cold island effect, we found a special phenomenon of the warm island effect in the lake group region of the BJD. However, the concept and formation mechanism remains unclear. In this study, based on observations of land surface processes in the area, we first used the daily mean temperature from 23 automated meteorological stations from 2010 to 2017 to calculate the mean daily temperature (T) ≥ 0 °C, T ≥ 10 °C accumulated temperature and negative accumulated temperature. Furthermore, using the net radiation from two eddy covariance measurement systems, characteristics of the net radiation between the lake and megadunes were analyzed. When comparing observed data in the lake group region to surrounding areas, accumulated temperature from all three meteorological stations in the lake group region were higher; the duration days of T ≥ 0 °C and T ≥ 10 °C were longer, whereas duration days of negative accumulated temperature were shorter. In addition, the initial dates for T ≥ 0 °C and T ≥ 10 °C accumulated temperature were earlier, whereas the end dates were delayed. Variations in heat were observed between stations in the lake group region that may be reflective of microclimate environments between lakes. The authors relate warm island formation in the BJD lake group region to (1) the heat carried by groundwater recharge to the desert lake groups has a great impact on the local temperature. (2) Net heat radiation to the atmosphere through sensible heat flux owing to sparse vegetation in the desert areas. Hence, heat resources are richer in the lake group region. This study aims to improve our understanding of the warm island effect from a comprehensive analysis of its intensity and distribution pattern around the lake group region as compared to its surroundings. In addition, the results from this study will provide a scientific basis for determining the source of lake water in the BJD.
Keywords: Badain Jaran Desert; lake group region; warm island effect; field observation; land surface processes Badain Jaran Desert; lake group region; warm island effect; field observation; land surface processes
MDPI and ACS Style

Liang, X.; Zhao, L.; Niu, Z.; Xu, X.; Meng, N.; Wang, N. Warm Island Effect in the Badain Jaran Desert Lake Group Region Inferred from the Accumulated Temperature. Atmosphere 2020, 11, 153.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop