Ground-Based Aerosol Optical Depth Measurement Using Sunphotometers

1. Front Matter

   Pages i-vi

   PDF

2. Introduction

   • Jedol Dayou, Jackson Hian Wui Chang, Justin Sentian

   Pages 1-8

3. Ground-Based Aerosol Optical Depth Measurements

   • Jedol Dayou, Jackson Hian Wui Chang, Justin Sentian

   Pages 9-30

4. Near-Sea-Level Langley Calibration Algorithm

   • Jedol Dayou, Jackson Hian Wui Chang, Justin Sentian

   Pages 31-37

5. Implementation of Perez-Dumortier Calibration Algorithm

   • Jedol Dayou, Jackson Hian Wui Chang, Justin Sentian

   Pages 39-56

6. Conclusion

   • Jedol Dayou, Jackson Hian Wui Chang, Justin Sentian

   Pages 57-60

7. Back Matter

   Pages 61-62

   PDF

This book gives a detailed review on ground-based aerosol optical depth measurement with emphasis on the calibration issue. The review is written in chronological sequence to render better comprehension on the evolution of the classical Langley calibration from the past to present. It not only compiles the existing calibration methods but also presents a novel calibration algorithm in Langley sun-photometry over low altitude sites which conventionally is a common practice performed at high observatory stations. The proposed algorithm avoids travelling to high altitudes for frequent calibration that is difficult both in logistics and financial prospects. We addressed the problem by combining clear-sky detection model and statistical filter to strictly imitate the ideal clear-sky condition at high altitude for measurements taken over low altitudes. In this way, the possible temporal atmospheric drifts, abundant aerosol loadings and short time interval cloud transits are properly constrained. We believe that this finding has an integral part of practicality and versatility in ground-based aerosol optical depth measurement, which is nowadays an important climate agent in many atmospheric studies. Finally, the outcome of this book introduces a new calibration technique for the study and measurement of aerosol monitoring with emphasis on aerosol optical depth that we believe could be very beneficial to researchers and scientists in the similar area.

• Aerosol Optical Depth Measurement
• Clear-Sky Detection Model
• Langley Calibration Algorithm
• Langley Sun-Photometry
• Statistical Filter
• Sunphotometer Calibration
• air pollution and air quality

• School of Science and Technology, Universiti Malaysia Sabah, Jalan UMS, 88400 Kota Kinabalu, Sabah, Malaysia

  Jedol Dayou

• School of Science and Technology, Universiti Malaysia Sabah, MILE 4, KG KIANSOM, JLN INANAM, 88837 Kota Kinabalu, Sabah, Malaysia

  Jackson Hian Wui Chang

• School of Science and Technology, Universiti Malaysia Sabah, LOT 3, BLOCK H, LORONG PUTERA JAYA 12, TAMAN PUTERA JAYA TEL, Sabah, Malaysia

  Justin Sentian

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