The climate system components flows are different from periods to other periods of time. However, along the time line and even with the natural climate change, it is possible to see a balance along these periods.
Nonetheless, from the 19th century on, this balance was disrupted by human influence. The first milestone in the well-known global warming was the Industrial Revolution, when CO2 concentration in the atmosphere started increasing drastically. The consequence was the first imbalances between the CO2 concentration as a result of photosynthesis and the one as a result of human influence. This means that humans affect the climate system, as you can see below.
Figure 1. Overview of climate changes elements that are relevant to global change (reproduced from Intergovernmental Panel on Climate Change)
Prior to the industrial revolution, the CO2 emitted by photosynthesis was balanced naturally. After human influence, the climate was affected the operation of climate processes and the natural balance of the climate system. The clearest consequence is the rise of global average surface temperature, including land and ocean. Starting from the end of 19th century, several researches show the average temperature increasing about 0.85 °C per year. Other researches show that this average temperature doubled the last half of this aforementioned registered period.