Anthropogenic sources stimulate resonance of a natural rock bridge

Anthropogenic and natural sources of ambient noise in the ocean

Ocean ambient noise results from both anthropogenic and natural sources. Different noise sources are dominant in each of 3 frequency bands: low (10 to 500 Hz), medium (500 Hz to 25 kHz) and high (>25 kHz). The low-frequency band is dominated by anthropogenic sources: primarily, commercial shipping and, secondarily, seismic exploration. Shipping and seismic sources contribute to ambient noise ac...

Anthropogenic air pollution sources

What one experiences today as atmosphere is a transient snapshot and result of its evolutionary history. Much of the development and present status was explained based both on scientific knowledge, and combined with established facts, even speculation. The planet Earth was formed around 4600 million years ago by the gravitational accretion of relatively small rocks and dust, within the solar ne...

share of natural and anthropogenic sources in distribution of heavy metals in a sediment core from zarivar lake

sediment core samples can provide useful information about aquatic environment. sedimentation rate, climate changes and heavy metal concentration are among the most important studies that are carried out on sediment cores. in this study, a sediment core of 70cm with aim of metal concentration investigation is collected from central part of the zarivar lake in the vicinity of the marivan city in...

Contributions of anthropogenic and natural sources of sulfur to SO2, H2SO4(g) and nanoparticle formation

Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Abstract Introduction Conclusions References Tables Figures ◭ ◮ ◭ ◮ Back Close Full Screen / Esc Printer-friendly Version Interactive Discussion EGU Abstract Atmospheric nanoparticles (NPs) are important intermediates in the transition from gas-phase molecules to new aerosols that can activate into cloud dro...

Relative Importance and Contribution of Anthropogenic and Natural Sources of Nitrosamine Precursors