Lidar depolarization measurement of fresh volcanic ash from Mt. Etna, Italy

被引：31

作者：

Pisani, Gianluca ^{[1
,2
]}

Boselli, Antonella ^{[3
,4
]}

Coltelli, Mauro ^{[5
]}

Leto, Giuseppe ^{[6
]}

Pica, Giulia ^{[7
]}

Scollo, Simona ^{[5
]}

Spinelli, Nicola ^{[1
,2
]}

Wang, Xuan ^{[1
,2
,8
]}

机构：

[1] Univ Naples Federico II, CNISM, I-80126 Naples, Italy

[2] Univ Naples Federico II, Dipartimento Sci Fis, I-80126 Naples, Italy

[3] CNISM, I-85050 Potenza, Italy

[4] CNR, IMAA, I-85050 Potenza, Italy

[5] Osservatorio Etneo, Ist Nazl Geofis & Vulcanol, I-95123 Catania, Italy

[6] Osserv Astrofis Catania, INAF, I-95123 Catania, Italy

[7] CORISTA, I-80126 Naples, Italy

[8] Univ Naples Federico II, CNR, SPIN, I-80126 Naples, Italy

来源：

ATMOSPHERIC ENVIRONMENT | 2012年 / 62卷

关键词：

Lidar; Volcanic ash; Mass concentration; Depolarization; Lidar-ratio; RAMAN LIDAR; POLARIZATION LIDAR; SAHARAN DUST; AEROSOL; ERUPTIONS; PINATUBO; INVERSION; EARLINET; CLOUD; PLUME;

D O I：

10.1016/j.atmosenv.2012.08.015

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A small, portable, polarization lidar system with scanning capability was used to perform range resolved measurements of fresh erupted volcanic plume from Mount Etna in Italy. Measurements were carried out on November 15, 2010 during a volcanic plume emission event by placing the lidar very close to volcano summit craters. Depolarization measurements highlighted that aerosol of different shape and optical properties were emitted by the two involved vents, Bocca Nuova and North-East Craters. In the plume emitted from Bocca Nuova Crater the mean value of aerosol linear depolarization ratio resulted near to zero, corresponding to non depolarizing particles or liquid droplets, while values of (16 +/- 2)% and (45 +/- 3)% were observed in the ash plume emitted from North-East Crater, in the morning and in the afternoon, respectively. The retrieved values of volcanic aerosol depolarization ratio, aerosol backscattering and lidar-ratio allowed distinguishing the changes in the properties of the emitted aerosol. Furthermore, the ash mass concentration at source was estimated, reaching a maximum value of 24,000 +/- 6000 mu g m(-3), with an additional systematic uncertainty of 50% related to the assumption of an effective radius of 10 mu m for ash particles. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：34 / 40

页数：7

共 41 条

[1] Ash and fine-mode particle mass profiles from EARLINET-AERONET observations over central Europe after the eruptions of the Eyjafjallajokull volcano in 2010 [J].

Ansmann, A. ;

Tesche, M. ;

Seifert, P. ;

Gross, S. ;

Freudenthaler, V. ;

Apituley, A. ;

Wilson, K. M. ;

Serikov, I. ;

Linne, H. ;

Heinold, B. ;

Hiebsch, A. ;

Schnell, F. ;

Schmidt, J. ;

Mattis, I. ;

Wandinger, U. ;

Wiegner, M. .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2011, 116

[2] The 16 April 2010 major volcanic ash plume over central Europe: EARLINET lidar and AERONET photometer observations at Leipzig and Munich, Germany [J].

Ansmann, A. ;

Tesche, M. ;

Gross, S. ;

Freudenthaler, V. ;

Seifert, P. ;

Hiebsch, A. ;

Schmidt, J. ;

Wandinger, U. ;

Mattis, I. ;

Mueller, D. ;

Wiegner, M. .

GEOPHYSICAL RESEARCH LETTERS, 2010, 37

[3]

Behncke B., 2010, INGV PROTOCOLLO INTE

[4] Calculation of the calibration constant of polarization lidar and its dependency on atmospheric temperature [J].

Behrendt, A ;

Nakamura, T .

OPTICS EXPRESS, 2002, 10 (16) :805-817

[5] Polarization lidar: Corrections of instrumental effects [J].

Biele, J ;

Beyerle, G ;

Baumgarten, G .

OPTICS EXPRESS, 2000, 7 (12) :427-435

[6]

Bissonnette L.R., 2005, LIDAR RANGE RESOLVED, P43, DOI DOI 10.1007/0-387-25101-4_3

[7] Sedimentation from strong volcanic plumes [J].

Bonadonna, C ;

Phillips, JC .

JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH, 2003, 108 (B7)

[8] Types of eruptions of Etna volcano AD 1670-2003: implications for short-term eruptive behaviour [J].

Branca, S ;

Del Carlo, P .

BULLETIN OF VOLCANOLOGY, 2005, 67 (08) :732-742

[9] COMPARATIVE LIDAR STUDY OF THE OPTICAL, GEOMETRICAL, AND DYNAMICAL PROPERTIES OF STRATOSPHERIC POST-VOLCANIC AEROSOLS, FOLLOWING THE ERUPTIONS OF EL-CHICHON AND MOUNT-PINATUBO [J].

CHAZETTE, P ;

DAVID, C ;

LEFRERE, J ;

GODIN, S ;

PELON, J ;

MEGIE, G .

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 1995, 100 (D11) :23195-23207

[10]

Chester D.K., 1985, MOUNT ETNA ANATOMY V

← 1 2 3 4 5 →