Looking from Bethlehem, toward Mt. Washington. September 26th 1855" with an additional sketch of tree

[From Jasper Cropsey Sketch book, 1855-1856]

Notes on Mt. Washington.

[From Jasper Cropsey Sketch book, 1855-1856]

Mt. Washington and the Sago River"

[From Jasper Cropsey Sketch book, 1855-1856]

Columbia-Cowlitz-Toutle Rivers, Washington, restoration subsequent to Mt. St. Helens eruption /

"September 1985."

Estudo expedito de solos do trecho Cuiabá-Aripuanã, MT, para fins de correlação e classificação.

Exame dos solos e amostragens; Roteiro da excursão; Sequencia e discussão sucinta dos estudos realizados: percurso: Cuiabá-Jangada-Barra do Bugres-Nova Olimpia-Tangará da Serra-Fazenda Itamarati-Campo Novo do Parecis; percurso: Juina-Castanheira-Juruena-Aripuanã; percurso: Aripuanã-Juina-Vilhena; Percurso: Vilhena-Cuiabá.

Composition-resolved size distributions of volcanic aerosols in the Mt. Etna plumes

Particle size distributions for soluble and insoluble species in Mt. Etna's summit plumes were measured across an extended size range (10 nm < d < 100 mu m) using a combination of techniques. Automated scanning electron microscopy (QEMSCAN) was used to chemically analyze many thousands of insoluble particles (collected on pumped filters) allowing the relationships between particle size, shape, and composition to be investigated. The size distribution of fine silicate particles (d < 10 mu m) was found to be lognormal, consistent with formation by bursting of gas bubbles at the surface of the magma. The compositions of fine silicate particles were found to vary between magmatic and nearly pure silica; this is consistent with depletion of metal ions by reactions in the acidic environment of the gas plume and vent. Measurements of the size, shape and composition of fine silicate particles may potentially offer insights into preemission, synemission, and postemission processes. The mass flux of fine silicate particles from Mt. Etna released during noneruptive volcanic degassing in 2004 and 2005 was estimated to be similar to 7000 kg d(-1). Analysis of particles in the range 0.1 < d/mu m < 100 by ion chromatography shows that there are persistent differences in the size distributions of sulfate aerosols between the two main summit plumes. Analysis of particles in the range 0.01 mu m < d < 0.1 mu m by scanning transmission electron microscopy (STEM) shows that there are significant levels of nanoparticles in the Mt. Etna plumes although their compositions remain uncertain.

Recent increase in black carbon concentrations from a Mt. Everest ice core spanning 1860-2000 AD

A Mt. Everest ice core spanning 1860–2000 AD and analyzed at high resolution for black carbon (BC) using a Single Particle Soot Photometer (SP2) demonstrates strong seasonality, with peak concentrations during the winter-spring, and low concentrations during the summer monsoon season. BC concentrations from 1975–2000 relative to 1860–1975 have increased approximately threefold, indicating that BC from anthropogenic sources is being transported to high elevation regions of the Himalaya. The timing of the increase in BC is consistent with BC emission inventory data from South Asia and the Middle East, however since 1990 the ice core BC record does not indicate continually increasing BC concentrations. The Everest BC and dust records provide information about absorbing impurities that can contribute to glacier melt by reducing the albedo of snow and ice. There is no increasing trend in dust concentrations since 1860, and estimated surface radiative forcing due to BC in snow exceeds that of dust in snow. This suggests that a reduction in BC emissions may be an effective means to reduce the effect of absorbing impurities on snow albedo and melt, which affects Himalayan glaciers and the availability of water resources in major Asian rivers.

Reauthorization of the federal-aid highway program : field hearings before the Committee on Environment and Public Works and thee Subcommittee on Water Resources, Transportation, and Infrastructure, United States Senate, One Hundred Second Congress, first session, March 25, 1991--Houston, TX ... April 22, 1991--Billings, MT.

Shipping list no.: 91-498-P.

Moss flora of Mt. Rainier National Park /

Title from caption.

Sensitive plants and noxious weeds of the Mt. Baker-Snoqualmie National Forest /

"R 6-MBS-02-1991"--P. [4] of cover.

Organizational, direct support, and general support maintenance repair parts and special tools lists (including depot maintenance repair parts and special tools) for coupler antenna CU-1669/GRC (NSN 5985-00-939-7495, coupler, antenna CU-1658/A (NSN 5985-00-999-5927), coupler antenna CU-1658A/A, and mount MT-3785/A (NSN 5985-00-937-0415).

"August 1979."