IPCC 2001 Report

Intergovernmental Panel on Climate Change

Emmissions of greenhouse gases and aerosols due to human activities continue to alter the atmosphere in ways that are expected to alter the climate
article

Human Induced Ocean Warming

National Oceanic & Atmospheric Administration, Geophysical Fluid Dynamics Laboratory, National Ocean Data Center, Air Resources Laboratory
Lead author: Syd Levitus
Where published: Science Magazine

The ocean has become warmer in the last 50 years and that warming is likely due to human-induced causes such as increases in atmospheric greenhouse gases
article

Greenhouse Gases Anthropogenic

US Dept of Energy, Livermore Labs
Lead author: Benjamin Santer

identified the anthropogenic "fingerprint" of climate change that took into account the confounding effects of natural variations
...
hard evidence that human activities have global-scale consequences
article