הלמן דוד

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תחומי מחקר: 
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קורות חיים

Education

2012 –                   PhD.

Department of Geography and Environment - Bar Ilan University, Israel. Advisors:

Dr. Itamar Lensky (Bar-Ilan University), Prof. Dan Yakir (Weizmann Institute of

Science) and Dr. Yagil Osem (Agricultural Research Organization – ARO).

Dissertation: The water use and water use efficiency of Mediterranean forests

assessed by satellite remote sensing.

2002 – 2004          M.Sc.

Environmental and Earth Sciences – The Hebrew University of Jerusalem, Israel,

supervised by Prof. Yigal Erel. Topic: The effect of climatic parameters on the

release of Pb and Sr isotopes during the dissolution of Granites (Geochemistry).

1998 – 2002          B.Sc.

Geology. Institute of Earth Sciences - The Hebrew University of Jerusalem, Israel.

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Professional experience

2011 –                   Computer programming and research assistant in the Remote sensing lab.

                              Department of Geography and Environment - Bar Ilan University.

2002 – 2004          Courses teaching in: Geochemistry; Soil Sciences; Computer skills – Institute of

                              Earth Sciences, The Hebrew University of Jerusalem, Israel.

2002 – 2004          Clean laboratory for trace metals and isotopic composition analyses – Institute of

                              Earth Sciences, The Hebrew University of Jerusalem, Israel.

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Awards and Scholarships

2015 – 2017          Israel Water Authority scholarship

2014 – 2015          The Rieger Foundation, USA: Marshall Tulin Fellowship program for

                               environmental studies (1 year)

2013 – 2014          The Ministry of Agriculture and Rural Development scholarship

2012 – 2016           Bar Ilan Presidential scholarship for excellent Ph.D. candidates   

2002 – 2004           Environmental and Earth Sciences scholarship for excellent M.Sc. students, The

                               Hebrew University of Jerusalem.

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* Find a more detailed CV here

 

 

תחומי התמחות

Research fields

My research focuses on land-atmosphere interactions, mainly Evapotranspiration (ET), in vegetation systems. I'm using satellite remote sensing data with micro-meteorological and flux data to assess water use (ET) and water use efficiency (WUE=GPP/ET) in Mediterranean forests. My current aims are: (a) to provide a useful remote sensing tool for continuous estimation of ET, and (b) to improve our understanding on terrestrial water cycle processes using this tool.

I'm also doing environmental and ecological remote sensing that include monitoring vegetation dynamics, detection of land degradation / rehabilitation in drylands, and land surface phenology. If you are interested in one of those fields or just curious about what I am doing, you are welcome to contact me and visit my personal web.

 

פרסומים

Publications

3.   Orit Rotem-Mindali, Yaron Michael, David Helman and Itamar M. Lensky, 2015. The role of local land-use on the urban heat island effect of Tel Aviv as assessed from satellite remote sensing. Applied Geography, 56, 145 – 153.

2.   David Helman, Itamar M. Lensky, Amir Mussery and Stefan Leu., 2014. Rehabilitating degraded drylands by creating woodland islets: Assessing long-term effects on aboveground productivity and soil fertility. Agricultural and Forest Meteorology, 195-196, 52 – 60.

1.   David Helman, Amir Mussery, Itamar M. Lensky and Stefan Leu., 2014. Detecting changes in biomass productivity in a different land management regimes in drylands using satellite-derived vegetation index. Soil Use and Management, 30(1), 32 – 39.

 

 

מחקר

PhD thesis

Title: "The water use and water use efficiency of Mediterranean forests assessed by satellite remote sensing"

Advisor:           Dr Itamar Lensky (Bar-Ilan University)

Co-advisors:    Dr Yagil Osem (Agricultural Research Organization - Volcani center)

                        Prof. Dan Yakir (Weizman Institute of Science)


To read more about my research